JERS-1

{{Infobox spaceflight

| name = JERS-1

| names_list = Japanese Earth Resources Satellite
Fuyo-1

| mission_type = Visible-light astronomy

| operator = NASDA (now JAXA)

| COSPAR_ID = 1992-007A

| SATCAT = 21867

| mission_duration = 2 years (planned)
6.6 years (achieved)

| manufacturer = Mitsubishi Electric

| launch_mass = 1400 kg

| dimensions = 0.9 m x 1.8 m x 3.2 m with solar spanning 3.5 m x 7.0 m

| power = 2000 watts

| launch_date = 11 February 1992

| launch_rocket = H-I

| launch_site = Tanegashima Space Center
Osaki Launch Complex

| disposal_type = Deorbited

| declared = 12 October 1998

| destroyed = 3 December 2001

| orbit_reference = Sun-synchronous orbit

| orbit_altitude = 568 km

| orbit_inclination = 97.7°

| orbit_period = 96 minutes

| orbit_repeat = 44 days{{cite web |title=JERS-1 Satellite Mission Summary |url=https://database.eohandbook.com/database/missionsummary.aspx?missionID=245&utm_source=eoportal&utm_content=jers-1 |website=The CEOS Database |access-date=14 March 2025}}

{{Short description|Japanese satellite}}

}}

Japanese Earth Resources Satellite 1 (JERS-1) was a satellite launched in 1992 by the National Space Development Agency of Japan (NASDA, now part of JAXA). It carried three instruments:

• An L-band (HH polarization) synthetic aperture radar (SAR);
• A nadir-pointing optical camera (OPS);
• A side-looking optical camera (AVNIR).

The satellite had a designated lifespan of only two years, however the mission was extended and it operated until 1998. Jers-1 re-entered the Earth's atmosphere in 2001.{{cite web |title=JERS-1 |url=https://www.earthdata.nasa.gov/data/platforms/space-based-platforms/jers-1 |website=NASA Earthdata |access-date=13 March 2025}} The satellite was used to map the largest of Earth's forests and observe coastal regions.{{cite web |title=JERS-1 |url=https://www.eoportal.org/satellite-missions/jers-1# |website=www.eoportal.org |access-date=13 March 2025}}