BGS ARPIT (Amateur Radio Payload for Information Transmission) was successfully launched on 30th December 2024 21:58 Hours (Indian Standard Time) from the Satish Dhawan Space Centre (SDSC) in Sriharikota. This innovative payload, designed as a space-based educational outreach program, has been jointly developed by the SJC Institute of Technology & the Upagrah Amateur Radio Club (VU2URC), and AMSAT-India.
The BGS ARPIT flew aboard the PSLV-C60 rocket as part of the SPADEX mission. It is integrated into the last stage of the PSLV-C60 POEM-4 (PS4 Orbital Experimental Module) platform, transforming the spent fourth stage of the rocket into an orbital laboratory.
Multimode Transmission for Educational Outreach
BGS ARPIT is a multimode transmitter capable of sending pre-recorded voice messages, Slow Scan Television (SSTV) images, and payload telemetry using the APRS packet protocol. It also offers two-way APRS services, enhancing global amateur radio connectivity.
The payload aims to engage students, startups, and the Indian space sector while celebrating India’s 75th Independence anniversary. Its innovative design includes audio, text, and image transmission capabilities using FM modulation in the VHF band.
Key Transmission Details
The first signals from BGS ARPIT are expected to be available over India on December 31, around 16:30 IST during its 9th orbit. Amateur radio enthusiasts can tune in to the following frequencies for transmission:
- 145.870 MHz FM for SSTV and audio messages
- 145.825 MHz FM for two-way APRS services
Reception reports are highly encouraged and can be submitted to [email protected] or [email protected]. AMSAT-India will award certificates to participants submitting valid reports.
Transmission Sequence
When operational, the BGS ARPIT payload will follow this sequence:
- Audio Message: A 45-second broadcast on 145.870 MHz FM
- Silent Interval: A 1-minute pause while switching to APRS mode on 145.825 MHz FM, enabling user digipeating
- Telemetry Broadcasts: Updates on payload health, including voltage, current, and temperature
- SSTV Images: Alternating between PD120 and Robot 72 formats
Each sequence will repeat for 15 minutes whenever the payload is activated by ISRO.
POEM-4 Mission Highlights
The POEM-4 platform, part of the PSLV-C60 mission, hosts 24 payloads, including 14 from ISRO/DOS centres and 10 from non-government entities such as universities and startups. It exemplifies India’s growing commitment to fostering innovation in the space sector.
For radio enthusiasts and educators alike, BGS ARPIT represents a significant step in leveraging space technology for global outreach and education. Stay tuned tonight for this groundbreaking launch!
Source:
https://sjcit.ac.in/dhritvan-space-lab/
https://www.isro.gov.in/POEM_4_Payloads_spadex.html
