Uplink FM transponder
145.950 MHz, FM
Downlink FM transponder
435.180 MHz, FM
145.850 MHz, 9k6 FSK AX.25, FM
437.550 MHz, 9k6 FSK AX.25, FM
437.275 MHz, CW
NORAD tbd COSPAR designator . Inclination 51.657 RA of A. Node 270.634 Eccentricity 0.0004901 Argument of Perigee 235.513 Revs per day 15.51941973 Period 1h 32m 47s (92.78 min) Semi-major axis 6 789 km Perigee x Apogee 408 x 414 km BStar (drag term) 0.002101200 1/ER Mean anomaly 261.997
LituanicaSAT-1 FM Morse beacon
The LituanicaSAT-1 nanosatellite carries a FM Morse beacon which periodically broadcasts it’s operational parameters to all the listeners on the ground. The beacon transmits data every 30 seconds at 437.275MHz with a power of 100mW and it’s signal is basically a FM modulated 600 Hz beep. FM modulation was chosen to support widely available cheap handheld radio receivers. Here is the breakdown of the data which is transmitted to the ground during every cycle:
LituanicaSAT-1 Packet AX.25 beacon
Below is the detailed specification of the packet structure.
All integers are in little-endian.
Structure defined here describes payload of an AX.25 frame
Telemetry is sent using Unnumbered (UI) AX.25 frames every 15 s