Posat

Also called PO-28 or Oscar 28

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General

Designation	22829 / 93061G
Launch date	25 Sep 1993
Country of origin	Portugal
Operator	Consorcio Po-SAT of the LNETI (Laboratorio Nacional de Engenhario e Technologia Industrial)
Mission	Telecommunications
Perigee/Apogee	787/803 km
Inclination	98.7°
Period	100.8 min
Launch vehicle	Ariane V59
Mass at launch	45.5 kg

First Portuguese satellite. Built by Surrey's University. Is very similar to Kitsat B with a GPS reception system.

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External resources

http://www.ee.surrey.ac.uk/CSER/UOSAT/research/gps.html

sat-index articles

Technical data

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Specifications

Prime contractor	SSTL (Surrey Satellite Technology Ltd.)
Platform	SSTL
Mass at launch	50.5 kg
Mass in orbit
Length	352 mm
Width	356 mm
Height	670 mm
Stabilization	gravity gradient
DC power
Design lifetime	5 years

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Transponder frequency chart (MHz)

Downlink freq.	Transponder/Beacon	Mode
145.975		JD 9600 bps FSK (Primary)
145.925		JD 9600 bps FSK (Secondary)

Uplink freq.	Transponder/Beacon	Mode
435.075		JD 9600 bps FSK (Primary)
435.050		JD 9600 bps FSK (Secondary)

Can be switched to downlink at 429.950 MHz

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