Marine Observation Satellite-1 (MOS-1), also known as Momo-1, was

Japan Japan is an island country in East Asia. Located in the Pacific Ocean off the northeast coast of the Asia, Asian mainland, it is bordered on the west by the Sea of Japan and extends from the Sea of Okhotsk in the north to the East China Sea ...

's first

Earth observation satellite An Earth observation satellite or Earth remote sensing satellite is a satellite used or designed for Earth observation (EO) from orbit, including spy satellites and similar ones intended for non-military uses such as environmental monitoring, me ...

. It was launched on 19 February 1987 on a

N-II N-II was the former name for the National Route from Madrid to Barcelona and France. According to the new Spanish roads nomenclature, the sections which have been already enhanced and upgraded to ''autovía'' have been recently renamed to A-2, ...

rocket from

Tanegashima Space Center The (TNSC) is Japan's primary spaceport, covering approximately about . It is located on the southeastern tip of Tanegashima, the easternmost of the Ōsumi Islands, approximately south of the major island of Kyushu. The site was selected on ...

and was operated by the

National Space Development Agency of Japan The , or NASDA, was a Japanese national space agency established on October 1, 1969 under the National Space Development Agency Law only for peaceful purposes. Based on the Space Development Program enacted by the Minister of Education, Culture ...

(NASDA). It is in a

polar orbit A polar orbit is one in which a satellite passes above or nearly above both poles of the body being orbited (usually a planet such as the Earth, but possibly another body such as the Moon or Sun) on each revolution. It has an inclination of abo ...

at roughly 900 km altitude, but was decommissioned on 29 November 1995.

Instruments

It has four instruments: * "Multi-Spectral Electronic Self-Scanning Radiometer (MESSR)" which offers 50 m resolution in two visible and two infra-red

spectral band Spectral bands are regions of a given spectrum, having a specific range of wavelengths or frequencies. Most often, it refers to electromagnetic bands, regions of the electromagnetic spectrum. More generally, spectral bands may also be means in ...

s over two 100 km swathes. * "Visible and Thermal Infrared Radiometer (VTIR)" which has a much lower resolution in one visible and three infrared bands over a 1,500 km swathe. * "Micro Scanning Radiometer (MSR)" which measures

microwave Microwave is a form of electromagnetic radiation with wavelengths shorter than other radio waves but longer than infrared waves. Its wavelength ranges from about one meter to one millimeter, corresponding to frequency, frequencies between 300&n ...

emission in the 23 GHz and 31 GHz bands. * "Data Collection System (DCS)" which is an experimental transponder.https://nssdc.gsfc.nasa.gov/nmc/spacecraft/displayExperiment.action?spacecraftId=1987-018A - 24 January 2020

References

External links

MOS-1 site
by JAXA Earth observation satellites of Japan Spacecraft launched in 1987 Derelict satellites orbiting Earth {{Japan-spacecraft-stub