Edison Demonstration of Smallsat Networks

Edison Demonstration of Smallsat Networks (EDSN) is a CubeSat Satellite constellation by NASA Ames developed as a technology demonstration of satellite networking. The constellation will consist of 8 identical satellites. The satellites follow the CubeSat specifications for a 1.5U CubeSat.

EDSN is funded through the Small Spacecraft Technology Program (SSTP).^[1] Additionally, NASA Ames has partnered with NASA Marshall, Montana State University, and Santa Clara University. All 8 CubeSats were destroyed during a launch failure of the Super Strypi rocket on November 3, 2015.^[2]

Mission

The eight identical spacecraft use absolute timing obtained from GPS Satellites to maintain a schedule. Each day, one satellite acts as a Captain and the rest act as Lieutenants. Each spacecraft is able to act as a Captain, and the role of Captain rotates through the constellation each 25-hour period. Lieutenants only communicate with the Captain, and the Captain is responsible for downlinking to an earth station.

Lifetime

NASA has estimated a 60-day mission lifetime, at which time the satellites will drift apart beyond the 100–120 km estimated range of the cross link and no longer be able to network.

Orbit

The constellation is planned for a 500 km altitude.^[3]

Design

EDSN is using Triangular Advanced Solar Cells (TASC) for power generation. Intersatellite communications will be on UHF via a tapespring antenna. Ground communications are via an S-band patch antenna.^[4] The spacecrafts use magnetometers and gyroscopes as attitude determination instruments and reaction wheels and torque coils for attitude control.

Cross link occurs via the UHF transceiver and on a UHF monopole with an estimated maximum range of 100–120 km. The link is initiated when the captain pings the specific Lieutenant's ID. The specified Lieutenant will then respond with data to be downlinked. Downlink occurs on S-Band between the current captain and ground station.

The flight computer is a Samsung Nexus S smartphone.^[5]

References

↑ http://www.nasa.gov/directorates/spacetech/small_spacecraft/edsn.html
↑ Graham, William (November 3, 2015). "Super Strypi conducts inaugural launch – Fails during first stage". NASA Spaceflight. Retrieved 2015-11-11.
↑ http://www.nasa.gov/centers/ames/engineering/projects/edison.html
↑ http://mstl.atl.calpoly.edu/~bklofas/Presentations/SummerWorkshop2013/Yost_EDSN.pdf
↑ Chartres, J.; Sanchez, H.; Hanson, J. (August 2014). "EDSN Development Lessons Learned". 28th Annual AIAA/USU Conference on Small Satellites.

External links

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January	SpaceX CRS-5 (Flock-1d' × 2 · AESP-14) – MUOS-3 – SMAP · FIREBIRD II A, B · GRIFEX · ExoCube

February	IGS-Radar Spare – Inmarsat 5-F2 – Fajr – DSCOVR – Progress M-26M – Kosmos 2503 / Bars-M No. 1

March	ABS-3A · Eutelsat 115 West B – WADIS-2 – MMS – Ekspress AM7 – USA-260 / GPS IIF -9 – KOMPSat-3A – IGS-Optical 5 – Soyuz TMA-16M – Galileo FOC-3, FOC-4 – IRNSS-1D – BeiDou I1-S – Gonets-M 11, 12, 13 · Kosmos 2504

April	SpaceX CRS-6 (Arkyd-3R · AggieSat 4 · Bevo 2 · Flock-1e × 14) – Thor 7 · SICRAL-2 – TurkmenAlem52E/MonacoSAT – Progress M-27M

May	Mexsat-1 – USA-261 / X-37 OTV-4 · LightSail-A · USS Langley · BRICSat-P · ParkinsonSat · GEARRS-2 · AeroCube 8A, 8B · OptiCube 1, 2, 3 – DirecTV-15 · SKY México-1

June	Kosmos 2505 / Kobalt-M – Sentinel-2A – Kosmos 2506 / Persona No.3 – Gaofen 8 – SpaceX CRS-7 (Flock-1f × 8)

July	Progress M-28M – UK-DMC 3 × 3 · CBNT-1 · DeOrbitSail – USA-262 / GPS IIF -10 – Star One C4 · MSG-4 – Soyuz TMA-17M – USA-263 / WGS-7 – BeiDou M1-S, M2-S

August	HTV-5 / Kounotori 5 (SERPENS · S-CUBE · Flock-2b × 14 · AAUSAT 5 · GOMX 3) – Eutelsat 8 West B · Intelsat 34 – Yaogan 27 – GSAT-6 – Inmarsat 5-F3

September	Soyuz TMA-18M – MUOS-4 – Galileo FOC-5, FOC-6 – TJSSW-1 – Gaofen 9 – Ekspress AM8 – XY-2 · Tiantuo-3 · ZDPS 2A, 2B · Xiwang-2 × 6 · DCBB · LilacSat-2 · NUDT-Phone-Sat · Xingchen × 4 · NS-2 · Zijing × 2 – Kosmos 2507, 2508, 2509 / Strela-3M × 3 – Pujian-1 · Tianwang 1A, 1B, 1C – Astrosat · LAPAN-A2 · ExactView 9 · Lemur-2 × 4 – BeiDou I2-S – NBN-Co 1A · ARSAT-2

October	Progress M-29M – Mexsat-2 – Jilin-1 × 4 – USA-264 / NOSS Intruder × 2 / NROL-55 · AeroCube-5c, 7 · SNaP-3 × 3 · PropCube × 2 · SINOD-D × 2 · ARC-1 · BisonSat · AMSAT Fox-1 · LMRST-Sat – APStar-9 – Türksat 4B – Tianhui 1C – USA-265 / GPS IIF -11

November	Chinasat 2C – HiakaSat · EDSN × 8 · PrintSat · Argus · STACEM · Supernova-Beta – Yaogan 28 – Arabsat 6B · GSAT-15 – Kosmos 2510 / EKS-1 / Tundra-11L – LaoSat-1 – Telstar 12V – Yaogan 29

December	LISA Pathfinder – Kosmos 2511 / Kanopus-ST · Kosmos 2512 / KYuA-1 – Cygnus CRS OA-4 (Flock-2e × 12 · CADRE · MinXSS 1 · Nodes × 2 · STMSat 1 · SIMPL) – ChinaSat 1C – Elektro-L No.2 – Kosmos 2513 / Garpun-12L – Soyuz TMA-19M – TeLEOS-1 · VELOX-C1 · Kent Ridge 1 · VELOX 2 · Galassia · Athenoxat-1 – DAMPE – Galileo FOC-8, FOC-9 – Progress MS-01 – Orbcomm-2 × 11 – Ekspress-AMU1 – Gaofen 4

Launches are separated by dashes ( – ), payloads by dots ( · ), multiple names for the same satellite by slashes ( / ). Cubesats are smaller. Manned flights are bolded. Launch failures are in italics. Payloads deployed from other spacecraft are (enclosed in brackets).

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