EYESAT-1

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EYESAT-1 is classified as:

Amateur radio

NORAD ID: 22825

Int'l Code: 1993-061C

Launch date: September 26, 1993
Source: South Korea (SKOR)
Launch site: FRENCH GUIANA (FRGUI)

Uplink (MHz): 145.850
Downlink (MHz): 436.795
Beacon (MHz):
Mode: 1k2 AFSK FM
Call sign:
Status: Inactive

EYESAT-1 (AO-27) is an amateur satellite constructed by the Amateur Radio Research and Development Corporation (AMRAD) at the facilities of Interferometrics in McLean, Virginia. It was originally designed as a commercial satellite known as EYESAT-1 but its completion was halted part way through the project. An agreement was made for AMRAD to finish the construction of the satellite and add an amateur satellite transponder. AO-27 is an “FM Repeater” in space. It essentially consists of a crystal controlled FM receiver operation at 145.850 MHz and a crystal controlled FM transmitter operating at approximately 436.795 MHz. Output power of the transmitter can be set to over 1 watt (rarely used), 0.5 watts (normal operation), or under 0.1 watts (exciter only). The uplink antenna is the linear polarized whip on the top face of the spacecraft and is shared with the commercial payload’s receivers. The downlink antenna is a 1/4 wave whip mounted on the bottom face of the spacecraft. Polarization is nominally linear, the rotation and revolution of the spacecraft and propagation effects will cause the actual signal polarization at a ground station to vary widely during a pass.