Srs-4 Satlab -
The Satlab SRS-4 is a high-speed, full-duplex S-band transceiver specifically designed for micro- and nano-satellites. It is an evolution of the SRS-3, offering significantly higher data rates and symbol rates (up to 5 MBd) for advanced orbital communications. Key Technical Specifications
The SRS-4 operates within the standard ITU space operations S-band frequencies and supports high-order modulation schemes. Specification Frequency Range (TX) 2200 to 2290 MHz Frequency Range (RX) 2025 to 2110 MHz Modulation BPSK, QPSK, 8PSK (TX); BPSK, QPSK (RX) Symbol Rate 100 kBd to 5 MBd (Variable) Output Power Adjustable 20 to 33 dBm (approx. 0.1 to 2 W) Sensitivity -122 dBm (<1% PER, 100 kBd BPSK) Form Factor PC/104 compatible aluminum enclosure Mass Operational Features
High Connectivity: Includes CAN-bus and RS-422 interfaces using the CubeSat Space Protocol (CSP), as well as an Ethernet interface supporting IP routing.
Advanced Security: Features AES-256-GCM link-layer encryption and authentication for secure data transmission.
Coding & Error Correction: Supports CCSDS recommended channel coding, including run-time configurable convolutional and Reed-Solomon forward error correction. srs-4 satlab
On-Orbit Upgradability: The software is fully upgradable while the satellite is in orbit, allowing for feature updates and performance tuning.
Rugged Design: Rated for wide temperature ranges (RX: -40°C to +85°C; TX: -40°C to +70°C) with built-in power monitoring and regulation. Applications and Heritage
High-Speed Data Transfer: Primarily used for downloading large data sets, such as high-resolution images or video, from small satellite platforms.
Flight Heritage: As of May 2025, the SRS-4 has a Technology Readiness Level (TRL) of 9, with over 100 units delivered and successfully operated in space missions since 2021. The Satlab SRS-4 is a high-speed, full-duplex S-band
Compatibility: Designed to integrate with both independent and commercial ground station networks.
For further technical details or to request a quote, you can visit the Official Satlab SRS-4 Product Page or check the Satlab Datasheet. Satlab SRS-4 Datasheet Revision 1.2
Since "SRS-4" is not a widely recognized standard designation in the public satellite industry (unlike SRS-2, SRS-3, or SRS-5+ which typically refer to specific ground stations or proprietary protocols), it is highly likely you are referring to a specific project, a typo for a known satellite (like the SSTL SRS series), or perhaps a specific SatLab brand product integration.
However, assuming you are looking for an interesting technical write-up on the intersection of SatLab hardware and satellite ground station operations (SRS), here is a speculative technical brief on how such a system is architected today. Orbit & Launch
Orbit & Launch
- Suggested orbit: Sun-synchronous LEO at 500–600 km altitude for steady solar illumination and predictable passes
- Launch: Piggyback/ride-share deployment via standard deployer (e.g., P-POD)
Mass & Power Budget (summary)
- Total mass: ~3.0–3.5 kg
- Average power generation: 12 W (sunlit), battery capacity ~15–20 Wh
- Typical nominal load: 6–9 W; peak loads (comm burst): 15–18 W with regulated scheduling
Detailed Technical Write-up: SRS for Satlab GNSS Ecosystem (Focus: Satlab S4)
3.4 User Interface (Software Controller)
- FR-10: The controller app shall provide a visual sky-plot showing satellite positions and signal-to-noise ratio (SNR).
- FR-11: The interface shall allow the user to stakeout points (navigate to a target coordinate) with visual and auditory guidance.
- FR-12: The system must support "Survey Styles," allowing users to save presets for topographic points, control points, and stakeout.
4. Why This Specific Setup is Interesting
If we look at the trends defining 2024-2025 satellite operations, a "SatLab + SRS" setup highlights three critical industry shifts:
A. The Death of the "Black Box" Historically, if a demodulator failed, you had to buy a new one from the vendor. In an SDR-based SRS, the "demodulator" is just a file of code. If you need to support a new modulation scheme (like a newer DVB-S2X standard), you simply update the software. No truck roll required.
B. Multi-Mission Capability A legacy station could usually only track one satellite at a time. A modern SDR-based SRS can potentially digitize a huge chunk of spectrum (e.g., 500 MHz wide) and process multiple satellites simultaneously from the same antenna feed. This turns a single dish into a multi-user asset.
C. Cloud-Native Operations The separation of the RF hardware (SatLab) from the processing (SRS) allows for "Split Architecture." The antenna can be on a remote island in the Arctic. The SatLab unit digitizes the signal and sends it over the internet. The SRS software sits in a cloud region (AWS, Azure), processing the data. This allows engineers to access "raw RF" from anywhere in the world without being physically present.
Mission Phases & Timeline
- Integration & Test (I&T) — 6 months
- Unit-level tests, vibration, thermal vacuum, EMC/EMI
- Launch & Commissioning — first 2 weeks on orbit
- Deploy, power-up, basic telemetry, establish ground link, ADCS detumble
- Primary Science Phase — Months 0–12
- Execute ADCS, comms, and MCU experiments per plan
- Extended Ops / Education Phase — Months 12+
- Open additional payload time to student experiments; possible software upgrades
Success Criteria
- ADCS achieves required pointing stability for 80% of nominal operational time.
- SDR demonstrates flexible communication modes with ≥75% pass reliability.
- Radiation test demonstrates fault detection and recovery meeting MTTR target.
- Educational access platform used by at least 3 university teams during primary phase.