AMSAT-UK

LAPAN-A2 FM and APRS satellite launched

LAPAN-A2 beacon – Iwan Nawi YC3BVG

The Indonesian amateur radio society ORARI report that on Monday, September 28, 2015 04:30 hours UT, the LAPAN-A2/ORARI satellite was launched from the Sriharikota Range (SHAR) of the Satish Dhawan Space Centre in India. Deployment took place  23 minutes later.

LAPAN-A2

LAPAN-A2 is in a 650 km orbit with an inclination of 6 degrees. It takes about 110 minutes to orbit the Earth and should pass over Indonesia and other near equatorial locations 14 times a day.

The low inclination equatorial orbit means it will be receivable from about 30 degrees North to 30 degrees South. About a third of the world’s population, over 2.4 billion people, live within the coverage area of the satellite.

The ground station at the LAPAN Satellite Technology Centre in Rancabungur, Bogor has made contact with LAPAN-A2. There will now be a period of activation and testing of all the satellite systems and it is expected to be about a month before the amateur radio payload becomes available for general use.

The primary aims of the mission are Earth observation using an RGB camera and maritime traffic monitoring using AIS, both using frequencies outside the Amateur Satellite Service.

The IARU has coordinated these frequencies for LAPA-A2/ORARI:
• 437.425 MHz telemetry beacon
• 435.880 MHz FM uplink
• 145.880 MHz FM downlink (5 watts)
• 145.825 APRS digipeater (5 watts)

The archipelago of Indonesia is part of the global “ring of fire” experiencing frequent natural disasters such as earthquakes, tsunamis, eruption of volcanoes, and floods. From past experience, the ground communication infrastructure is often damaged, limiting the ability to coordinate the aid effort in the stricken region. A satellite based telecommunication system is usually the only means of communication.

The LAPAN-A2 microsatellite carries the amateur radio short text message repeater (APRS) and a voice repeater. The APRS (Automatic Packet Reporting System ) and the voice communication payload is developed by LAPAN using the LAPAN-TUBSAT UHF/VHF radio heritage along with a COTS APRS modem. The primary application of APRS is intended for communications in support of disaster mitigation and relief efforts.

LAPAN-A2 on the Earth Observation Portal
https://directory.eoportal.org/web/eoportal/satellite-missions/l/lapan-a2

Listen to a recording of the 437.425 MHz telemetry signal at https://chirb.it/MrgLGy

Satellite tracking information https://amsat-uk.org/beginners/satellite-tracking/

AMSAT-ID Facebook Group https://www.facebook.com/groups/831872960241607/

Organisasi Amatir Radio Indonesia (ORARI) in Google English http://tinyurl.com/IndonesiaORARI

LAPAN-A2 paper
http://www.researchgate.net/publication/259844289_Development_of_Micro-satellite_Technology_at_the_Indonesian_National_Institute_of_Aeronautics_and_Space_%28LAPAN%29

The IARU Region 3 Conference takes place in Bali, Indonesia, October 12-16, 2015
https://amsat-uk.org/2015/08/21/iaru-region-3-act-on-band-plan-satellite/