LituanicaSat-1

Vilnius University
LituanicaSat-1

NASA-Catalog: 39568

Uplink FM transponder

145.950 MHz, FM

Downlink FM transponder

435.180 MHz, FM

Uplink Packet

145.850 MHz, 9k6 FSK AX.25, FM

Downlink Packet

437.550 MHz, 9k6 FSK AX.25, FM

Beacon

437.275 MHz, CW

Call

Status

DECAYED

Orbital Parameter

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

Mission

Telemetry

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

LituanicaSAT-1 Packet AX.25 beacon

LituanicaSat-1

Below is the detailed specification of the packet structure.

NOTE:
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

LituanicaSat-1

QSL