### Satellite name 1. VR3X-A 2. VR3X-B 3. VR3X-C ### Description V-R3x is a NASA Ames, Stanford, and Carnegie Mellon mission demonstrating on-orbit topology recovery and distributed radiation measurements. All three 1U spacecraft were built using [PyCubed](http://pycubed.org) hardware. The entire project design repo will be made public shortly. - All three spacecraft have identical RF info (below). - Launch January 2021 ### Image  ### Transmitter 1 UHF Radio - 915.6 MHz #### Transmitter Name HopeRF RFM95PW (akin to Semtech SX1276) #### Type Transceiver #### Service 'Space Research' #### Downlink Frequency 9.156e+8 Hz (915.6 MHz) #### Downlink Mode LoRa SF7, BW62500, CR8 = ~3000 bps Explicit preamble of length 8 Sync word = 0x12 #### Dowlink Encoding Beacon: raw bytes ([interactive decode here](https://mybinder.org/v2/gh/maholli/VR3X-decoder/main?filepath=notebook.ipynb)) Downlink (via command only): base64 #### Uplink Frequency 9.156e+8 Hz (915.6 MHz) #### Uplink Mode LoRa SF9, BW250000, CR8 = ~2000 bps Explicit preamble of length 8 Sync word = 0x12 #### Uplink Encoding Raw bytes #### Call Sign KD2BHC ### TBD - [x] operator call sign [2021-01-05] - [ ] NORAD catalog number - [x] websites: https://www.nasa.gov/ames/v-r3x/ http://vr3x.space/ (will announce pending internal approval) - [ ] transmitter 2 details - [ ] make full spacecraft design repo public