LAPAN-A4 Concept and Design for Earth Observation and Maritime Monitoring Missions

Lapan-A4 is Indonesian fourth's microsatellite after successfully launch of LAPAN-3/ LAPAN-IPB on June 2016 which is currently in 2 years operational. Continuing the previous mission, all activities such design, assembly, integration, and test are fully carried out in Indonesia. The main mission of LAPAN-A4 is an earth observation using multispectral imager and support global maritime traffic monitoring using space-based Automatic Identification System (AIS) receiver. The other missions are scientific research using space-based magnetometer and experimental thermal infrared sensor. The multispectral imager consists of four bands (R, G, B, and NIR) medium resolution and high resolution. The space-based AIS receiver is more advance compare with the AIS receiver that has been flown in LAPANA2/LAPAN-ORARI and LAPAN-A3/LAPAN-IPB. These two missions will complement previous missions of LAPAN-A2/LAPAN-ORARI and LAPAN-A3/LAPAN-IPB. Supporting these missions, several aspects of design has been defined, considered, and analyzed include the payload system, bus and electronics system, and structure. LAPAN-A4 plans to launch in the 1^st quarter of 2020.