Marine Observation Satellite (MOS)

MOS-1 was equipped with three types of sensors: MESSR,( a spectrometer for measuring visible near infrared radiation), VTIR, (a device for measuring visible thermal infrared radiation), MSR, (for measuring microwave radiation).These seusor finished their rolls oe seuding wave onNovember 29,1995. MOS-1b, which has the same functions as MOS-1, was launched subsequently as a follow-up.and finished its opration on April 17,1996

Main Characteristics

Sbape
Box type with expanding type solar paddle (one wing)
Body 1.26x1.48x2.4(m)
Solar paddle 2.0x5.28(m)

Weight
Approx 7.40kg (at lift off)

Attitude Contrel
Three-axis stabilized (controled bias momentum)

Mission life
2 years

Reliability
0.5 (after 2 years in orbit)

Launch vehicle
MOS-1 : N-II rocket, MOS-1b : H-I rocket
Altitude : Approx. 909km
Inclination : Approx. 99deg.
Period : Approx. 103min.
Recurrent period : 17 days (west-ward shift)
Descending Node Time : 10:00-11:00 a.m.

Multi-spectral Electronic Self-scanning Radiometer (MESSR)

MESSR is an electronic scanning radiometer that observes solar light reflected from the earth surface. It is equipped with two camera systems that are set parallel to the satellite's flight direction.

Visible and Thermal Infrared Radiometer (VTIR)

Using a rotating scanning mirror, the VTIR mechanically scans from right to left at right angle to the satellite's flight direction.

Microwave Scanning Radiometer (MSR)

The MSR is a radio sensor scanning the earth surface along the flight path with its rotating dish antenna.

Utilization of data

Image data obtained from the MOS will be processed and distributed to universities, research institutes and other user institutions so that they can perform many different kinds of experiments that will lead to the establishment of earth observation technology. Many foreign countries have requested the use of these data. It is anticipated that the visible, infrared and microwave image data taken from space are useful to monitor water and air pollution and to survey agricultural, marine and water resource use.

[LRSGIS]