LituanicaSAT-1
Operator | Vilnius University, Innovative Engineering Projects, NPO |
---|---|
COSPAR ID | 1998-067EN |
SATCAT no. | 39569 |
Website | www |
Mission duration | 5 months deployed, 6 months 19 days in space (planned mission: 6 months) |
Spacecraft properties | |
Manufacturer | Innovative Engineering Projects, NPO |
Dry mass | 1090 g. |
Start of mission | |
Launch date | 9 January 2014, 18:07 | UTC
Rocket | Antares 120 |
Launch site | MARS LP-0A |
Contractor | Orbital Sciences |
Deployed from | ISS |
Deployment date | 28 February 2014 |
End of mission | |
Decay date | 28 July 2014 |
Orbital parameters | |
Reference system | Geocentric |
Regime | Low Earth |
LituanicaSAT-1 was one of the first two
Description
The satellite conforms to standard 1U size
Subsystems
Attitude determination and control
LituanicaSAT-1 uses passive magnetic attitude control system consisting of permanent magnets that create a control torque and soft magnets that provide dampening torque using hysteresis effect. Following attitude sensors are implemented for attitude determination:
- PS-MPU-6000A MEMS motion sensor
- PS-MPU-9150A MEMS motion sensor
- L3GD20 MEMS three-axis digital output gyroscope
- HMC5883L three-axis digital magnetometer
Command and data management
There are two on board computers in LituanicaSAT-1 due to redundancy requirements: the flight computer based on
Payload
The main payload is amateur radio FM mode V/U voice repeater. It operates on 145.950 MHz uplink (PL 67 Hz CTCSS) and 435.180 MHz downlink. The FM repeater subsystem identifies itself with callsign LY5N. The first filter of repeaters receiver is 15 kHz wide, second is 12 kHz. The transmit filter is set to +/- 5 kHz, and bandwidth to 10 kHz, but this width depends highly on the incoming signal width, for example if the uplink signal is 15 kHz wide, it will be cut down with 12 kHz filter. The repeater payload was engineered and developed by Žilvinas Atkočiūnas and Žilvinas Batisa.[6] Due to temperature changes, the downlink frequency may be shifted down by 5 kHz.[7]
Power supply subsystem
The power supply sub-system includes a GomSpace Nanopower P31u power board with a lithium-ion battery and solar cells.[8]
Communications subsystem
Comm subsystem consists of AX.25 transceiver and corresponding antennas. He-100 COTS transceiver is used for establishing and maintaining radio communication with the ground station. The key technical specifications of the radio transceiver are as follows:
- Operating frequencies: TX: 437 MHz / RX: 144 MHz
- Sensitivity: -104.7 dBm @ BER 10-3
- Transmit power: 100 mW – 2 W
- Receive power: < 200 mW
- Data transfer rate: 9600 bit/s
- Data protocol: AX.25
- Operating temperature: from -30 to +70 °C
Antennas
There are 4 monopole antennas on LS-1: three UHF antennas and one VHF antenna. Each antenna is made of approx. 0.2 mm thick and 5 mm wide spring steel measurement tape. In deployed configuration, all UHF antennas are pointed towards the Z+ body axis direction and VHF antenna is pointed toward –Z body axis.
Mission control
The satellite is commanded from
OSCAR status
On June 8, 2014,
References
- ^ Rainey, Kristine (22 July 2015). "It's a March of the CubeSats as Space Station Deployment Continues".
- ^ "NASA - NanoRacks-LituanicaSAT-1". www.nasa.gov.
- ^ "LituanicaSAT-1 CubeSat Update". 14 March 2014.
- ^ "LituanicaSat-1 - AMSAT-UK". amsat-uk.org.
- ^ "LituanicaSat transponder test was a full success". DK3WN SatBlog. 5 August 2023.
- ^ "LituanicaSat-1 repeater rev.2 – LY3H". ly3h.epalete.com.
- ^ "LituanicaSat – DK3WN SatBlog". www.dk3wn.info. 5 August 2023.
- ^ "Satellite Description | LituanicaSAT-1". Archived from the original on 4 July 2014. Retrieved 11 June 2014.
- ^ "VU radijo klubas LY1BWB - kolektyvinio radijo mėgėjų tobulėjimo tinklaraštis". www.rk.projektas.vu.lt.
- ^ Petrauskas, Karolis (29 August 2014). "ls1mcs: LituanicaSat-1 MCS" – via GitHub.
- ^ "Data submission | LituanicaSAT-1". Archived from the original on 30 May 2014. Retrieved 9 June 2014.
- ^ "OSCAR Number for LituanicaSAT-1 – AMSAT-NA". Amsat.org. 28 June 2017.
- ^ "LituanicaSAT-1 FM Transponder Active". Amsat-uk.org. 6 June 2014.
External links
- Project web page
- LituanicaSAT-1 YouTube channel
- A three-dimensional view of the satellite (in Lithuanian)