Orbital Telemetry builds modules designed to go between your flight computer and radio to complete your small satellite’s telemetry system.  Interface to the flight computer is currently 3 signals over a RS-422 differential interface implementing a source synchronous serial interface. Other interfaces are available upon request.

The module implements the Consultive Committee for Space Data Systems (CCSDS) protocols for uplink and downlink. This includes the ability to bit synchronize on the grounds 1,0 data stream in-between each standard CLTU packet. It also includes complete CLTU packet decode including the BCH decoding with decoded data stored in a fifo and sent to the flight computer over RS-422.

For the CCSDS compatible downlink, the interface to the flight computer is a synchronous serial interface consisting of three signals each of which are sent over RS-422 differential links to insure robust connectivity. This data is packetized into CCSDS standard packets including an Attached Sync Marker and encoded in (255,223,1) Reed-Solomon Forward Error Correction packets that are pseudo-randomized right before going to the transmitter.

Our Generation 1 module is currently being flown with S-band receivers and transmitters on the FastSat-HSV 01 satellite in near polar orbit, and is currently awaiting launch in a smaller cubesat out of Wallops. Data rates are given for this application (see Products Page), and will vary with frequency band and modulation selected.