Minimize NorSat-1 and 2

NorSat-1 and NorSat-2 microsatellites

Spacecraft    Sensor Complement    NorSat-2     Launch    References

The NSC (Norwegian Space Center) selected the NorSat-1 mission, an affordable approach to science in space, as part of the National Space Program. NorSat-1 has two objectives: 1) investigating solar radiation and space weather and 2) the development of new methods for detection and management of ship traffic. - The experience with the launch and operation of the low cost satellite AISSat-1, launched on July 10th 2010, has been most successful. Three years of continuous operation of AISSat-1 has resulted in a new understanding of maritime traffic, particularly in the High North. This demonstration has also shown that a low cost platform may be utilized for other missions. 1)

In June 2013, the NSC signed a contract with UTIAS/SFL (University of Toronto Institute for Aerospace Studies/Space Flight Laboratory) for the development of Norway's first science satellite, NorSat-1. In a small ceremony at the Norwegian Space Center in Oslo, the Managing Director of the Space Flight Laboratory, Dr. Robert E. Zee, signed the contract in the presence of the Canadian Ambassador to Norway, David Sproule. 2) 3) 4)

NorSat-1 will carry both, a next generation AIS transponder and scientific instruments. The new satellite will be built to investigate solar radiation, space weather and detect ship traffic. Initially named NorSat-1, the launch is planned for 2015 or early 2016. The NSC will coordinate the development and the integration of the instruments for the new platform. The instruments will cover several aspects of scientific research focusing on the sun, including measuring TSI (Total Solar Irradiation) with one instrument, and measuring electron plasma from the sun with a LP (Langmuir Probe).

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Figure 1: Artist's rendition of the deployed NorSat-1 microsatellite (image credit: UTIAS/SFL)


Spacecraft:

NorSat-1 is based on SFL's next-generation satellite bus, which offers fine attitude control, high power generation, and high downlink rates. This next generation bus—referred to as the NEMO platform—straddles the border between a nanosatellite and a small microsatellite, and represents the next evolution in microsatellite miniaturization. NorSat-1 will use the same system architecture and technologies developed for the NEMO-AM mission (aerosol monitoring mission for the Indian Space Research Organization) and NEMO-HD mission (high-definition Earth observation for Slovenian Space-SI), which are themselves based on SFL's space-proven and highly successful GNB (Generic Nanosatellite Bus), currently flying in the AISSat-1 mission for Norway, recently-launched UniBRITE and BRITE-Austria, and which is the basis for more than 10 other missions, currently under development. SFL has the experience and technology to deliver a high-quality mission for NorSat-1 at a reasonable cost. 5) 6)

NorSat-1 will provide ample power generation to operate all spacecraft payloads continuously, while maintaining sub-degree (±0.4°) attitude control, average telemetry downlink rates exceeding 1 Mbit/s, and a benign thermal environment for payloads and bus electronics. NorSat-1 has ample on-board data processing and storage capabilities, with greater than 20 orbits worth of payload data and bus telemetry storable by OBCs (On-Board Computers). NorSat-1 will achieve these capabilities with a total launch mass (including separation system) of < 30 kg.

Structure: The spacecraft structure comprises of all of the physical components needed to properly house the satellite avionics, payloads, and any other necessary equipment, and keep them safe through all expected environments. It is comprised of a heritage design concept from the GNB, utilizing two intricately designed loadbearing aluminum trays, housing much of the avionics, enclosed by six aluminum body panels. The design builds on the design methodology of the GNB nanosatellite, whereby two trays are used to mount large and/or massive components (e.g. reaction wheels, batteries, radios, etc.). The satellite is then enclosed using metallic panels onto which solar cells or other light deployable/pre-deployed components can be attached; these panels also provide a degree of additional structural support.

TCS (Thermal Control Subsystem): The TCS design is passive. The techniques used involve controlling the overall bus temperature using various thermal control tapes on the outside of the spacecraft, as well as controlling the internal component temperatures through materials selection and specific mounting methods. This type of implementation allows for a low-risk and robust satellite thermal design. In addition to these passive techniques used, an active heater is present in the battery pack in order to ensure the battery cells are kept above their minimum charging temperature (0°C).

ADCS (Attitude Determination and Control Subsystem): Attitude sensing is provided by six SFL-designed sun sensors, along with a three-axis magnetometer to determine the local magnetic field. A three-axis rate-sensor is also incorporated to provide additional attitude information when in eclipse. Three-axis control of the satellite is achieved using three orthogonally mounted reaction wheels and magnetorquers. A dedicated on-board computer is present on the satellite to operate the necessary attitude algorithms. The satellite with the above mentioned attitude hardware, is capable of achieving pointing within ±5°. With the addition of a precision sun sensor mounted directly on the CLARA instrument, NorSat-1 can achieve a fine pointing mode, enabling pointing within ± 0.5º (mean plus 3σ) while the sun is visible. Additionally, a GPS receiver is included to provide positioning and timing data, as well as support the payload activities.

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Figure 2: NorSat-1 microsatellite with overall dimensions (image credit: UTIAS/SFL)

C&DH (Command and Data Handling) subsystem: Three identical SFL designed on-board computers comprise the C&DH subsystem on NorSat-1. These on-board computers are heritage designs from previous SFL missions, and represent highly mature hardware and associated software for controlling all of the spacecraft functions, as well as communications. The HKC (Housekeeping Computer) is typically dedicated to performing housekeeping tasks on the spacecraft, such as collecting regular telemetry from each component. The ADCC Attitude Determination and Control Computer) is dedicated to performing attitude and determination related processing, such as reading the necessary attitude sensors and issuing commands to the attitude actuators. The third computer on board is the POBC (Payload On-Board Computer), dedicated to interfacing with the payloads; the SIB (Serial Interface Board) is also considered a portion of this computer.

RF communications: The TT&C (Telemetry Tracking and Command) subsystem provides a full-duplex, bidirectional radio communications system between the satellite and the Earth station. It incorporates a two-radio system: a UHF receiver for uplink communications, and an S-band transmitter for the downlink. The uplink UHF receiver is supplemented with a cavity bandpass filter to provide rejection of the spacecraft's transmitter emissions, a down-converter that provides frequency translation between S-band and ultra-high frequencies (UHF), and a UHF receiver that includes demodulation, bit synchronization, and descrambling functionality. Both of these radios are heritage designs used on previous SFL missions, and utilize a dual-patch antenna system, with the antennas for each link located on opposite sides of the spacecraft; a total of four S-band patch antennas are used for this, providing close-to omnidirectional coverage.

EPS (Electrical Power Subsystem): EPS has three main functions: power generation, energy storage, and power distribution. Power generation is done by means of externally mounted triple junction solar cells, grouped in eight-cell strings, with a beginning of life efficiency of roughly 28%. The solar cells are mounted on the satellite such that at least one string is visible in each of the six primary directions, to allow for safe-hold power generation in any state. The main sunward facing side of the satellite, however, has a total of six strings of solar cells for additional power generation during payload activities. A total of 96 solar cells exist on NorSat-1, capable of over 40 W of power generation.

Energy storage is done by means of a three-series, two-parallel lithium-ion battery pack, with an integrated BIM (Battery Interface Module). The BIM provides battery cell protection, and provides the battery telemetry that operates the battery heater. - Power distribution on the spacecraft is achieved through an in-house developed MPS (Modular Power System). It is comprised of a passive backplane, on which multiple µSPN (Micro Switched Power Node) cards are connected - each load on the spacecraft is connected to an individual switch. A 5 V supply, SABR (Solar Array/Battery Regulator), SABIN (Solar Array/Bus Interface Node), and IFN (Interface Node) card are also mounted onto this backplane to provide the remaining functionalities to the power system.

 

Project development status:

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Figure 3: Photo of the NorSat-1 microsatellite during thermal vacuum testing (image credit: UTIAS/SFL)

• July 13, 2015: The NSC (Norwegian Space Center) awarded a contract to UTIAS/SFL to built NorSat-2. 7)

• July 9, 2015: Two NAIS (Novel SAT-AIS) receivers, built by Kongsberg Seatex, were delivered to the Norwegian Space Center to be added to the NorSat-1 satellite for launch in 2016. Thedevelopment of the NAIS receivers started in Feb. 2014. The delivery of the flight models to the customer in just 16 months is a major achievement for the Kongsberg and ESA project team. The NAIS receiver development was supported by ESA's ARTES (Advanced Research in Telecommunications Systems) program. 8)

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Figure 4: Photo of the NAIS receiver (image credit: Kongsberg Seatex AS, ESA)

 


 

Sensor complement of NorSat-1: (CLARA, m-NLP, NAIS)

NorSat-1 is a collaborative mission the payloads will be developed, tested and delivered by three organizations (Ref. 6):

1) The TSI (Total Solar Irradiation) instrument, called CLARA (Compact Lightweight Radiometer), is made by PMOD (Physikalisch-Meteorologisches Observatorium Davos) World Radiation Center in Davos Switzerland.

2) The m-NLP (multi-Needle Langmuir Probe), providing measurements of space plasma density, is made by the UiO (University of Oslo), Norway.

3) The AIS receiver, called NAIS (Novel SAT-AIS Receiver), is made by KSX (Kongsberg Seatex), Trondheim, Norway.

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Figure 5: Illustration of the NorSat-1 deployed microsatellite (image credit: UTIAS/SFL)

 

CLARA (Compact Lightweight Absolute Radiometer)

CLARA is a scientific instrument that will be used to determine the total solar irradiance of the Sun. This instrument is the primary payload in the NorSat-1 mission and will take operational precedence over the other payloads. The CLARA instrument contains measurement cavities that must be exposed, unshadowed, and must be pointed at the Sun with ±0.5º, 3σ, to carry out its scientific measurements. These cavities must also be held at a constant temperature, with a maximum drift of 0.1º C/ hour, while the measurements are being taken.

PMOD/WRC (Physikalisch-Meteorologisches Observatorium Davos / World Radiation Center) of Switzerland is building the CLARA (Compact and Lightweight Absolute RAdiometer) to fly on the NorSat-1 mission of NSC (Norwegian Space Center). CLARA is being designed as compact and lightweight as possible in order to maximize its flight opportunity on a multi-payload satellite such as NorSat-1. CLARA has four main science objectives: 9) 10) 11)

• Absolute Radiometry Validation: CLARA will allow for validation of laboratory results in space that provide an explanation for some discrepancies measured by PMO6-, DIARAD-, and ACRIM-type radiometers compared to the American TIM/SORCE experiment.

• Space Weather: Through successfully modeling the TSI variations, correlations to the UV (Ultra Violet) radiation variations can also be made. Thus, the long-term stability of UV variations can also be assessed.

• Climate Research: Large amounts of evidence suggest that TSI (Total Solar Irradiance) has an influence on the Earth's climate. CLARA aims to extend the TSI data record for solar atmosphere and climate modelers through monitoring the TSI variations with great accuracy and sensitivity. Continuous monitoring of the TSI levels is needed in order to reduce uncertainties, and cover the 11-year solar cycle.

• Helioseismology: CLARA will be the highest-cadence radiometer in space to-date, allowing the assessment of the TSI variability at very high frequencies. The higher frequency of measurements allows for helioseismology investigations of the solar atmosphere in order to assess the acoustic energy carried into the solar atmosphere by high frequency sound waves.

Instrument design: The CLARA instrument is separated into two separate aluminum enclosures, connected together via four large titanium studs, and a couple of wires to transfer the measurement data. The thermally isolated section contains the sensitive measurement components, and is wrapped with a MLI (Multi Layer Insulation) blanket to further the thermal isolation. To minimize any mechanical and thermal pointing misalignments between the sun sensor and the CLARA apertures, the precision sun sensor is directly mounted on the payload via a dedicated bracket, extending from the rear, "less thermally sensitive", half.

Dimensions

114 mm x 141 mm x 155 mm

Mass

2.63 kg

Power consumption

5.6 W

Measuring cadence

30 s

Table 1: CLARA parameters

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Figure 6: Illustration of the CLARA instrument (image credit: PMOD/WRC, UTIAS/SFL)

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Figure 7: Cross-section of the CLARA instrument (image credit: PMOD/WRC)

 

m-NLP (multi-Needle Langmuir Probe)

The Langmuir probe instrument is the secondary payload for the NorSat-1 mission. This instrument will measure the plasma around the Earth at a higher resolution compared to other Langmuir probe instruments that have been flown in space. This instrument, developed by UiO (University of Oslo), uses four probes that are held at different electrical potentials outside of the bus, and measures the electrical characteristics of the plasma near the spacecraft as the bus moves through the plasma around the Earth. Most other Langmuir probe instruments use a probe that sweeps through different voltages, but due to the time it takes for this sweep and the high velocities of orbiting satellites, spatial resolutions of these measurements tend to be on the order of one kilometer. Since the probes in this mission are held at constant voltages, sampling rates are much higher and give spatial resolutions of the measurements on the order of one meter. These probes must be held outside of the plasma sheath that forms around the bus as it goes through its orbit, which places constraints on the orientation of the probes relative to the orbit.

The instrument is a new concept Langmuir Probe capable of high-resolution measurements of space plasma density, and can cover the density range from 108-1013 particles/m3. The system consists of two or more cylindrical needle probes, and is therefore referred to as UiO's m-NLP (multi-Needle Langmuir Probe). A key feature of the m-NLP technique is the ability to determine the electron density without the need to know the spacecraft potential and electron temperature.

One of the main design challenges of the Langmuir Probe system aboard NorSat-1 is getting the probe tips in an area of undisturbed space plasma. As the spacecraft is in orbit, it creates a ‘plasma wake' in the opposite direction of travel. Because this "plasma wake" is poorly understood and hard to predict, the probe tips are placed on long protruding booms, in an effort to place the tips as far out into the undisturbed plasma as possible. In doing this, the booms become quite long, quickly increase in complexity, and increase the launch volume of the spacecraft quite significantly. To minimize this, the probes must be made deployable. Having to have a deployment system carries its own set of challenges and requirements as well, such as the necessity of ground handling equipment and testing methods.

A second design challenge that the m-NLP carries is the need to have sufficient conductive surface area (coupled to the spacecraft chassis reference ground) available on each side of the spacecraft in order to "close" the measurement circuit. As the probe tips collect high-mobility electrons from the space plasma, the spacecraft will inevitably charge up, and could potentially begin to repel incoming electrons if a sufficient charge is achieved. The conductive surface area on the spacecraft sides provide a path for the less mobile ions to hit the spacecraft in the direction of velocity, in order to offset the spacecraft charge build-up. The required surface area is made as a spacecraft requirement, and is simply verified by inspection.

A third design challenge is that the probe tips must be free of contaminations that could impact the measurements. For example, finger oils can create an insulating layer on the probe, and would reduce electrons flow through the probes and affect the resulting measurements. A reliable mitigation plan for this concern is thus required for the design, such as protective covers, replacement tips, or repeated cleaning.

m-NLP design: The Langmuir Probe tips are placed on large deployable booms, whose overall size is limited to the length of the spacecraft itself. Two identical Langmuir Probe cassettes are included on NorSat-1, each housing two Langmuir Probes. The booms are held down by a uniquely designed mechanism that, through spring preloads, forces the booms to stay stowed. Using a commercial shape memory alloy pin-puller, the pre-loaded spring mechanism can be released on orbit, allowing it to perform a half-turn, and consequently push both booms out with a large enough force to reach their fully deployed positions. Once fully deployed, each of the booms is able to lock in place via a locking pin. The cassette design is shown in Figure 8; also depicted is the electronics box that accompanies the cassettes on the spacecraft.

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Figure 8: Illustration of the m-NLP instrument components (image credit: UiO, UTIAS/SFL)

 

NAIS (Novel Sat-AIS Receiver)

Kongsberg Seatex of Norway is designing the AIS receiver instrument. The AIS receiver will detect and track maritime traffic in Norwegian and international waters via AIS (Automatic Identification System). The AIS system is a line-of-sight, self-organized, time division multiple-access messaging system that provides situational awareness to a large number of maritime vessels at sea. It allows the exchange of information such as ship identification, position, course and speed, allowing governmental organizations to monitor and direct the ship traffic. Mandated by the IMO (International Maritime Organization), all vessels over 300 gross tons are obligated to carry and operate the AIS system. Monitoring and collecting AIS data from space has proven to be effective, and of great interest to the Norwegian government, due to the large portions of open water that is currently impossible to monitor via coast-based AIS stations.

The AIS instrument assembly consists of a dual antenna VHF (Very High Frequency) receiver supporting four VHF channels each. The technology of the receiver is similar to the previous AIS receivers, designed as the main payloads on previous SFL satellites, such as AISSat-1, which was launched on July 12, 2010, as well as AISSat-2, launched on July 8, 2014. This new AIS receiver will be more advanced and will have the opportunity to test out new detection algorithms. The motivation for ship detection via AIS is fairly clear and proven from previous AIS missions, in that detection from space allows for a more complete picture of the activity in the waters and can better prevent ship collisions. The objective of NorSat-1 is to complement to the on-going capability of the Norwegian government of space-based AIS systems. The AIS receiver payload is the sole non-science payload aboard the NorSat-1 mission.

Design challenges: Two main challenges exist with the AIS payload. First, because of the low frequency of operation (VHF), the antennas have to be quite large relative to the overall spacecraft size. On previous SFL designed AIS satellites, single pre-deployed antennas were used, however, since NorSat-1 intends to use two orthogonal antennas, the volume that the antennas consume would be significant. Because of this, similar to the Langmuir Probe instrument, the antennas must be made deployable. In reducing the launch volume of the satellite, the amount of launch vehicles able to accommodate the spacecraft increases considerably.

The second main design challenge associated with the AIS payload is that the receiver is highly sensitive to electromagnetic radiation at its frequency of operation (VHF). At this relatively low frequency, it is not uncommon that many electronics generate noise, and could easily interfere with the payloads data collection. As such, a fairly strict requirement on platform generated noise to the AIS payload is placed on the spacecraft design.

NAIS design: The overall dimensions of the AIS receiver payload are shown below in Figure 6. The total mass of the instrument is about 1.5 kg.

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Figure 9: Illustration of the NAIS receiver (image credit: Kongsberg Seatex, UTIAS/SFL)

VHF antennas: UTIAS/SFL and NSC (Norwegian Space Center) have collaborated on a number of AIS satellites. Numerous previous satellites on-orbit of the GNB size, including AISSat-1 and AISSat-2, use a single pre-deployed VHF antenna. The pre-deployed method being favored because of the reduction of risk over deployable components (i.e. a deployable component always has a single point of failure – if it does not deploy properly).

In the case of NorSat-1, however, two orthogonal antennas are required, rendering the volume consumed by pre-deployed antennas to be significantly larger. The added volume by two orthogonal antennas, of each ~50 cm length, would restrict the number of potential launch opportunities, and would place additional constraints on the launch vehicle in order to accommodate the satellite. Because of this, deployable antennas were favored over pre-deployed for the two VHF antennas on NorSat-1.

The design of the deployable AIS antennas is derived from a previous SFL designed AIS antenna used on the GNB. Tape spring antennas are used, they are wrapped around the satellite and held down at the top +Y face by a spherical tooling ball attached directly to the XPOD (Experimental Push Out Deployer). Upon release, the antennas deploy themselves by using their own stored energy. This technique can be seen in Figure 10, which shows the satellite installed in the vertically mounted XPOD-Duo.

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Figure 10: NorSat-1 shown in the vertically mounted XPOD-Duo (image credit: UTIAS/SFL)

In light of some of the conclusions from the research done using the tape springs, each tape spring is mounted differently, such that when wrapped together their curved sides are concentric and can rest together. The concave side of the tape spring is faced towards the satellite to avoid accidental contact to the spacecraft (this is the stiffer direction), to allow the tape springs to wrap in their favorable direction, and be stiffer at the hold down point; as explained in the research section above. Minimum bending radii are limited to 7 mm to avoid any damage to the antennas during stowage (Ref. 6).

 


 

NorSat-2 (Advanced Ship Tracking and VHF Data Exchange)

NORSAT-2 is the fifth satellite to be constructed UTIAS/SFL for Norway. The Norwegian Space Center (NSC) and Space Norway are leveraging the development of NORSAT-1 to enable this mission for advanced ship tracking and VHF data exchange. The NORSAT-2 satellite will carry a next generation AIS (Automatic Identification System) receiver from Kongsberg Seatex, along with a VDE (VHF Data Exchange) payload that will enable two-way communication at higher data rates than possible with AIS. One of the key challenges is to fit a directional VHF antenna on a small microsatellite, with NORSAT-2 being only 15 kg and roughly 20 x30 x40 cm in dimensions (not including solar wings). SFL has developed a deployable crossed Yagi antenna for the satellite that allows for compact stowage during launch and simple release after ejection from the launch vehicle (Figures 11 and 12). SFL is also providing a high-speed S-band feeder uplink for the satellite, in addition to an S-band system for telemetry and command. 12)

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Figure 11: NorSat-2 with VDE antenna stowed for launch (image credit: UTIAS/SFL)

Bus and antenna manufacturer

UTIAS/SFL

Polar orbit (SSO)

600 km altitude

Attitude control

3 axis stabilized

Solar power generation

56 W peak

Spacecraft mass

16.7 kg

Satellite body size

20 x 30 x 40 cm

Mass of AIS payload

1.3 kg

Mass of VDES instrument

1.5 kg

Mass of antenna

0.3 kg

VDES transmit duty cycle

10% of orbit, adjustable

VDES receive band

157.1875-157.3375 MHz

VDES transmit RF power

1 W linear (28 dB C/I3)

VDES transmit band

161.7875-161.9375 MHz

Feeder link

S-band, 1 Mbit/s in both directions

Payload technology

Software Defined Radio (initial software is Arbitrary Waveform Generator)

Yagi antenna size

800 x 975 mm

Peak antenna gain

8.0 dBi

AIS payload manufacturer

Kongsberg Seatex

VDES payload manufacturer

Kongsberg Seatex

Satellite owner

NSC (Norwegian Space Center)

AIS payload user

Norwegian Coastal Authority

VDES payload owner

Space Norway

Table 2: Key technical parameters of NorSat-2 13)

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Figure 12: NorSat-2 with AIS (fore) and VDE (aft) antennas deployed (image credit: UTIAS/SFL)

VDES (VDE System) is needed to meet the growing demand for data exchange by providing additional capacity that is not available from existing AIS systems. While AIS provides for identification and position reporting/tracking of maritime vessels, VDES integrates AIS with ASM (Application Specific Messages), which are new channels with more capacity and better reliability of message delivery. Adding VDE satellite services effectively increases the range of ship to shore and ship to ship communication beyond direct line of sight. NorSat-2 will be one of the first satellites with this capability (Figure 13).

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Figure 13: Operations concept for NorSat-2 (image credit: UTIAS/SFL)

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Figure 14: Engineers observe the integration of 72 smallsats that will launch on a Soyuz rocket from Baikonur (image credit: Glavkosmos)

 

Launch: The NorSat-1 and NorSat-2 secondary payloads were launched on July 14, 2017 (06:36:49 UTC, 09:36:49 Moscow time) on a Soyuz-2.1a / Fregat -M vehicle from the Baikonur Cosmodrome, Kazakhstan. The primary payload on this flight was Kanopus-V-IK 1. 14) 15) 16) 17)

Orbit: Injection of the primary payload and smallsats into 3 different orbits. Such flexibility can't be found in any other launch system in the world. The NorSat-1 and -2 orbital altitude is 600 km. — Over the 8+ hour mission, a total of 72 commercial and university smallsats will be injected into three unique orbits, with the subsequent de-orbiting of the booster.

Note: The launch of NorSat-1 from French Guiana has been cancelled by Arianespace in agreement with NSC (Norwegian Space Center) and UTIAS/SFL. The cancellation is due to an incompatibility between the satellite and the launcher supporting structure provided by Arianespace.- Both the satellite and XPOD were ready for launch, but the bracket provided by Arianespace was not properly designed. It was concluded that it is unsafe to proceed with the launch with the current bracket structure. 18)

 

Secondary payloads: In total, 72 secondary satellites will be launched on the Kanopus-V-IK 1 mission, including spacecraft for four separate commercial remote sensing and weather constellations.

Glavkosmos, a subsidiary of Russian state space corporation Roscosmos, is seeking to become a larger provider of rideshare launch services for small satellites. In addition to this upcoming launch, Glavkosmos is planning to fly about 40 more small satellites on two Soyuz missions from the new Vostochny Cosmodrome in Russia's Far East region late this year, with additional launch opportunities planned for 2018 and beyond.

In addition, the German Orbital Systems company of Berlin, ECM Space Technologies GmbH, actively participates in the launch, by supplying a DCSM (Deployment Control and Separation Sequence Management) unit. Integration of two secondary satellites built in Germany, three from Russia and 12 from the USA. GlavKosmos subcontracted this task to ECM. 19)

Forty-eight (48) Dove satellites (Flock 2k) of Planet will be launched into an SSO of 475 km altitude. 20) Planet of San Francisco is the biggest single customer for the upcoming launch. This "flock" of 48 satellites will go into a sun-synchronous orbit, but one slightly different from those of 88 similar satellites launched on an Indian Polar Satellite Launch Vehicle in February. Those satellites went into a sun-synchronous orbit that crosses the equator at 9:30 hours local time. The new satellites will launch into an orbit that crosses the equator at about 11:00 hours local time.

• Spire Global of San Francisco, which is deploying a fleet of CubeSats to collect GPS radio occultation and ship tracking data, has eight (8) of its Lemur CubeSats on this launch.

• GeoOptics of Pasadena, CA, is flying its three CICERO 6U CubeSats (CICERO-1, -2,- 3), designed to collect GPS radio occultation data to support weather forecasting.

• Flying Laptop, a minisatellite (120 kg) of IRS (Institute of Space Systems), University of Stuttgart, Germany.

• WNISAT- 1R (Weather News Inc. Satellite 1R), a microsatellite (43 kg) for north arctic routes and atmosphere monitoring. The project is started from the commercial objects between Weathernews and Axelspace, Japan. The object of the WNISAT-1R mission is monitoring of the Northern sea routes and of the CO2 content of the atmosphere. 21)

• NorSat-1 and NorSat-2 of the Norwegian Space Center, built by UTIAS/SFL on GNB (Generic Nanosatellite Bus). The NORSAT-2 satellite, with a mass of 16 kg, will carry a next generation Automatic Identification System (AIS) receiver from Kongsberg Seatex, along with a VDE (VHF Data Exchange) payload that will enable two-way communication at higher data rates than possible with AIS. NorSat-1 (< 30 kg) carries three instruments: An AIS receiver, a Langmuir Probe Instrument, and CLARA (Compact Lightweight Absolute Radiometer), intended to observe total solar irradiation and variations over time.

• TechnoSat is a nanosatellite project (18 kg) of the Technical University of Berlin. Test of new nanosatellite components, including a camera, a new reaction wheel system, a star tracker, a transmitter, a fluid dynamic actuator, and commercial laser retro-reflectors.

• Corvus-BC 1 and Corvus-BC 2: Astro Digital, formerly known as Aquila Space, (formed from the core team of the former Dauria Space daughter Canopus Systems) developed the Corvus-BC Earth observation CubeSats (6U, 10 kg).

• MKA-N 1, 2: Two Earth observation CubeSats (6U, 10 kg each) of Roskosmos, built by Dauria Aerospace.

• NanoACE, a technology demonstrator by Tyvak Nanosatellite Systems, Inc. (Irvine, CA) to validate the Endeavor suite technologies that will be used for future missions and is solely for the purpose of internal Tyvak development as an attitude control experiment. A 3U CubeSat (5.2 kg).

• Mayak: A Russian 3U CubeSat (4kg) developed by a group of young scientists named "Your sector of space" with support of the Moscow State University of Mechanical Engineering (MSUME). In orbit, the 3U CubeSat will deploy four triangular reflectors, 4 m2 each, which form a tetrahedral shape. The reflectors are made from metallized membrane with reflection coefficient of 95%. The reflector will provide a -10 optical magnitude at the beginning of the flight to allow for easy tracking. Mayak will be put into a tumbling motion over all axes, with at least 1 revolution per second.

• Iskra-MAI-85, a CubeSat of the Moscow Aviation Institute. 22)

• Ecuador-UTE-YuZGU, a CubeSat of the Kursk South-Western State University, Russia.

09:36:49 – launch vehicle lift-off;
09:38:46 – 1st stage separation;
09:41:36 – 2nd stage separation;
09:41:38 – fairing jettison;
09:45:37 – head module separation;
09:45:42 – 09:52:18 – Fregat upper stage flight to a transfer orbit;
10:35:01 – 10:36:27 – Fregat upper stage flight to the Kanopus-V-IK separation orbit;
10:38:07 – Kanopus-V-IK separation (orbit i=97.44°; H = 522.5km; h = 478.6km);
11:13:29 – 11:14:35 – Fregat upper stage flight to the second transfer orbit;
11:58:29 – 11:59:35 – Fregat upper stage flight to the separation orbit of a group of smallsats;
12:01:43 – 12:05:03 – Phase 1. Separation of 5 smallsats (orbits i=97.61°; H = 601.5-600.1km; h = 600.0-590.1km);
12:10:03 – 12:26:43 – Phase 2. Separation of 19 smallsats (orbits i=97.62-97.61°; H = 601.0-606.9km; h = 580.1-587.4km);
12:51:49 – 12:53:15 – Fregat upper stage flight to the third transfer orbit;
13:34:39 – 13:35:51 – Fregat upper stage flight to the separation orbit of a group of smallsats;
17:18:23 – 17:41:17 – Separation of 48 smallsats (orbits i=97.00-97.01°; H = 485.0-477.4km; h = 482.2-450.5km);
17:51:49 – 17:53:45 – Fregat upper stage flight to reentry orbit;
~18:18:49 – Fregat upper stage reentry (altitude – 100 km), sinking in the Indian Ocean.

Table 3: Overview of the Kanopus-V-IK timeline (Moscow time, Ref. 14)

 


1) Magne Osmundsen, "NORSAT-1 Mission Requirements Document," June 23, 2013, URL: ftp://pmodwrc.ch/pub/CLARA/Requirements/MRD%2023062013%20NSC.pdf

2) "SFL Wins Contract for First Norwegian Science Satellite – NORSAT-1," UTIAS/SFL, June 14, 2013, URL: http://utias-sfl.net/?p=1041

3) "Norway's Satellites," Norsk Romsenter, URL: http://web.spacecentre.no/eng/Norway-in-Space/Norway-s-Satellites

4) Berit Ellingsen, "A New Norwegian Satellite - NORSAT-1," NSC, January 9, 2013, URL: http://web.spacecentre.no/eng/content/view/full/6900

5) "NorSat-1, Norway's first scientific satellite,"UTIAS/SFL, January 25, 2014, URL: http://utias-sfl.net/?page_id=1260

6) Shahil Kanji, "Mechanical Aspects of Design, Analysis and Testing for the NorSat-1 Microsatellite," Thesis submitted for the degree Master of Applied Science at the University of Toronto, 2015, URL: https://tspace.library.utoronto.ca/bitstream/1807/70383/1/Kanji_Shahil_201511-MAS_thesis.pdf

7) "NORSAT-2 Contract Awarded to SFL by Norwegian Space Centre," UTIAS/SFL, July 13, 2015, URL: http://utias-sfl.net/?p=2263

8) "Tracking marine traffic via satellite," ESA, July 10, 2015, URL: http://www.esa.int/Our_Activities/Telecommunications_Integrated_Applications
/Tracking-marine_traffic_via_satellite/%28print%29

9) Wolfgang Finsterle, Silvio Koller, Daniel Pfififfner, Marcel Spescha, Markus Suter, Werner Schmutz, Benjamin Walter, "CLARA – A Compact and Light-Weight Absolute Radiometer," URL: http://lasp.colorado.edu/media/projects/SORCE/meetings/2013-presentations/Web_Posters/Poster_Finsterle_CLARA.pdf

10) Wolfgang Finsterle, Silvio Koller, Ivo Beck, Marcel Spescha, Markus Suter, Benjemin Walter, Werner Schmutz, "The new TSI radiometer CLARA," Proceedings of SPIE, 'Earth Observing Missions and Sensors: Development, Implementation, and Characterization III,' Vol. 9264, Beijing, China, October 13, 2014, doi:10.1117/12.2069614

11) "The Compact Lightweight Absolute Radiometer (CLARA) on the Norwegian nanosatellite NORSAT-1," URL: https://www.pmodwrc.ch/pdf/clara.pdf

12) "Microsatellites: NORSAT-2," UTIAS/SFL, Jan. 25, 2014, URL: https://www.utias-sfl.net/?page_id=2312

13) "NorSat-2, AIS + VDES," Norsk Romsenter, February 2017, URL: http://nfas.autonomous-ship.org/gmknfas-170215/6_mikrosat.pdf

14) "ROSCOSMOS: Soyuz-2.1a Launch Vehicle with KANOPUS-V-IK Satellite Successfully Lifts Off From Baikonur," Roscosmos, July 14, 2017, URL: https://xissufotoday.space/2017/07/roscosmos-soyuz-2-1%D0%B0-launch-vehicle-with-kanopus-v-ik-satellite-successfully-lifts-off-from-baikonur/

15) Stephen Clark, "Soyuz rocket lifts off with 73 satellites," Spaceflight Now, July 14, 2017, URL: https://spaceflightnow.com/2017/07/14/soyuz-rideshare-launch/

16) Jeff Foust, "Soyuz set to launch 72 smallsats," Space News, July 7, 2017, URL: http://spacenews.com/soyuz-set-to-launch-72-smallsats/

17) "Russia's Soyuz-2.1 Set to Launch 71 Smallsats Later This Week," Satnews Daily, July 10, 2017, URL: http://www.satnews.com/story.php?number=704505558

18) "NORSAT-1 Launch Postponed Due to Faulty Bracket Provided by Arianespace," UTIAS/SFL, April 14, 2016, URL: http://utias-sfl.net/?p=2402

19) "Launch campaign for „Soyuz": maiden flight for our DCSM unit," Orbital Systems, May 25, 2017, URL: http://www.orbitalsystems.de/launch-campaign-for-soyuz-maiden-flight-for-our-dcsm-unit/

20) Leena Pivovarova, "48 Doves to Launch on a Soyuz Rocket," July 7, 2017, URL: https://www.planet.com/pulse/48-doves-to-launch-on-a-soyuz-rocket/

21) https://www.axelspace.com/en/solution_/wnisat1r/

22) "Russia will launch into orbit 72 small satellites per launch," Russian Aviation, 15 June 2017, URL: https://www.ruaviation.com/news/2017/6/15/8955/?h
 


The information compiled and edited in this article was provided by Herbert J. Kramer from his documentation of: "Observation of the Earth and Its Environment: Survey of Missions and Sensors" (Springer Verlag) as well as many other sources after the publication of the 4th edition in 2002. - Comments and corrections to this article are always welcome for further updates (herb.kramer@gmx.net).

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