Formosat-1

{{Infobox spaceflight

|name =Formosat-1
ROCSAT-1
福爾摩沙衛星一號

|image = 300px

|operator=National Space Organization

|mission_type = Science

|launch_date= Jan 27, 1999

|launch_rocket = ATHENA-1/LMLV1

|decay_date = 22 May 2023{{cite web |url=https://www.n2yo.com/satellite/?s=25616 |title=ROCSAT 1 |work=N2YO.com |date=22 May 2023 |access-date=4 July 2023}}

|mission_duration = 5.5 years

|BOL_mass = 401 kg

|website = [https://www.nspo.narl.org.tw/tw2015/projects/FORMOSAT-1/program-description.html Formosat-1]

|orbit_reference = Geocentric

|orbit_inclination = 35°

|orbit_period = 96.7 mins

}}

Formosat-1 ({{Lang-zh|t=福爾摩沙衛星一號|p=Fúěrmóshā wèixīng yīhào}}, formerly known as ROCSAT-1) was an Earth observation satellite operated by the National Space Program Office (NSPO; now the Taiwan Space Agency) of the Republic of China (Taiwan) to conduct observations of the ionosphere and oceans. The spacecraft and its instrumentation were developed jointly by NSPO and TRW using TRW's Lightsat bus, and was launched from Cape Canaveral Air Force Station, US, by Lockheed Martin on January 27, 1999.{{cite web|title=FORMOSAT-1: Low-earth-orbit scientific experimental satellite|url=https://www.nspo.narl.org.tw/history_prog.php?c=20030403&ln=en|access-date=November 24, 2022|publisher=Taiwan National Space Organization}} Formosat-1 provided 5½ years of operational service. The spacecraft ended its mission on June 17, 2004 and was decommissioned on July 16, 2004.{{cite web|title=FormoSat-1|url=https://www.eoportal.org/satellite-missions/formosat-1#ecp-experimental-communication-payload |access-date=November 24, 2022|publisher=eoPortal.org}}{{cite journal|first1=L. |last1=Wu|first2=S.-S. |last2=Chen|first3=J. Ju-Chen |last3=Yaung|title=Space Program in Taiwan|journal=Proceedings of ASC (Asian Space Conference), Chiang Mai, Thailand|date=November 26, 2004}}