TRANSMITTER ARCHITECTURE
RECEIVER ARCHITECTURE
POSSIBLE GROUND STATIONS
These are the ground stations found to buy for S-band communications.
| ISIS | Nanoavionics | Surrey Satellite Technology |
|---|---|---|
 |  |  |
More information can be found in the following table:
| Company | Price (€) | Frequency bands (MHz) | Antenna size (m) | Antenna gain (dBi) | RX noise figure (dBi) | Installation | Onsite mantainance | Onsite training of personnel | Other | Info | |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Full Ground Station Kit for S-band | ISIS | 52,500.00 | 143 – 148 432 – 440 2200 - 2500 | 3 | 35.4 | 0.9 | Onsite | Yes | Yes | Combined UHF/VHF/S-band | https://www.isispace.nl/product/full-ground-station-kit-s-band/ https://www.isispace.nl/wp-content/uploads/2016/02/ISIS.GSK_.DS_.01.01_V2.2.1.pdf |
| UHF/VHF/S-Band Ground Station Kit (TRL 9*) | Nanoavionics | 25,150 € (basic) | 1.5 | ≈ 30 | - | - | - | - | Combined UHF/VHF/S-band | https://n-avionics.com/cubesat-components/ground-station-kits/cubesat-uhf-vhf-s-band-ground-station-kit/ | |
| KSAT? | |||||||||||
| Multi-Mission Ground Segments (TRL 9*) | Surrey Satellite Technology | 3-7.3 | ≈ 30-43 | Yes | Yes? | Yes | Surrey-produced software for command and control, S-band telemetry and telecommand, S- and X-band payload downlink | https://www.sst-us.com/downloads/datasheets/1348-sstl-ground-segment-datasheet_web.pdf |
GROUND STATIONS SPECIFICATIONS
KSAT
Data acquisition-High data rate modem
| Specifications | Units | Values |
|---|---|---|
| Maximum sampling frequency | [Msps] | 600 |
| Maximum bandwidth | [MHz] | 75 |
| Modulation schemes | - | BPSK,QPSK, SQPSK, 8PSK,16APSK, 16QAM,32 APSK |
| FEC techniques | - | Convolutional, Reed-Solomon, LDPC |
Antenna performance
S-band
| Specifications | Units | Downlink | Uplink |
|---|---|---|---|
| Reflector size | [m] | 3.7 | |
| Frequency band | [MHz] | 2200-2300 | 2025-2110 |
| G/T | [dB/K] | 12.6 | - |
| Polarisation | - | RHCP/LHCP | |
| EIRP | [dBW] | - | 44.8 |
TT&C services
| Specifications | Units | Downlink | Uplink |
|---|---|---|---|
| Bandwidth | [MHz] | 5 | |
| Sampling frequency | [Msps] | 5 | 1 |
| Modulation schemes | - | PCM/FM, FSK, BPSK, QPSK, OQPSK | |
| Coding/decoding techniques | - | Viterbi decoding, Reed Solomon, Convolutional Encoding | |
ISIS
| S-band | VHF | UHF | ||||
| Specifications | Units | Downlink | Downlink | Uplink | Downlink | Uplink |
|---|---|---|---|---|---|---|
| Antenna size | [m] | 2 | 3.2 | 3 | ||
| Frequency band | [MHz] | 2200-2500 | 143 – 148 | 432 – 440 | ||
| Antenna beamwidth | [°] | 5.1 | 52 | 30 | ||
| G/T | [dB/K] | 4.9 | - | - | - | - |
| Antenna gain | [dB] | 31.35 | 13.2 | 16.3 | ||
| Overall noise figure | [dB] | 15 | 1.6 | - | 2 | - |
| Antenna polarisation | - | RHCP/LHCP | RHCP-LHCP | RHCP-LHCP | ||
| Data rates | [kbps] | 14.4 – 115.2 | 1.2 – 9.6 | 1.2, 2.4, 4.8, 9.6 | 1.2 – 9.6 | 1.2, 2.4, 4.8, 9.6 |
| RF output power | [W] | - | - | 100 | - | 120 |
| Modulation schemes | - | - | Raised-Cosine BPSK, AFSK, FSK, GMSK. | AFSK, FSK, BPSK | Raised-Cosine BPSK, AFSK, FSK, GMSK. | AFSK, FSK, BPSK |
| Communications protocol | - | - | AX.25 | AX.25 | AX.25 | AX.25 |
Leaf.space
