Phase 3D

Also called Amsat Oscar 40, AO-40

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General

Designation	26609 / 00072D
Launch date	16 Nov 2000
Country of origin	Germany
Mission	Telecommunications
Perigee/Apogee	355 / 58974 km
Inclination	6.2°
Period
Launch vehicle	Ariane V135_v135

Several problems occured right after launch, noticeably with the 70 cm transmitter, the IHU-2 and the 400-newton motor (helium valve stuck). On 13 Dec 2000, the satellite went silent. It came back up on 25 Dec 2000 after a hard reset sent in L-band. The computer crash may be caused by hard radiation that the satellit encounters in transfert orbit.

A leak is suspected to explain to higher than normal spin rate.

On 27 Jan 2004 the satellite went silent when a battery failed. Consequences should be serious.

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External resources

http://www.amsat.org/amsat/sats/phase3d.html

http://www.amsat-dl.org/
sat-index articles

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End of life

Out of service	Jan 2004
Cause	Battery failure.
Decay

Technical data

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Specifications

Prime contractor	AMSAT-DL
Platform
Mass at launch	646 kg (including 250 kg fuel)
Mass in orbit
Dry mass	397 kg
Dimension	1120 x 675 cm
Solar array
Stabilization	3-axis
DC power	~ 600 W
Design lifetime

Orbit control with GPS (12 antennas); capable of computing it's own Kepler elements. Has its own apogee motor (MBB S400). Has cameras to picture Earth.

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Uplink frequency chart (MHz)

Uplink	Digital	Analog Passband	Center
15 m	none	21.210 - 21.250	21.230
2 m	145.800 - 145.840	145.840 - 145.990	145.915
70 cm	435.300 - 435.550	435.550 - 435.800	435.675
23 cm (1)	1269.000 - 1269.250	1269.250 - 1269.500	1269.375
23 cm (2)	1268.075 - 1268.350	1268.325 - 1268.575	1268.450
13 cm (1)	2400.100 - 2400.350	2400.350 - 2400.600	2400.475
13 cm (2)	2449.200 - 2446.450	2446.450 - 2446.700	2446.575
6 cm	5668.300 - 5668.550	5668.550 - 5668.800	5668.675

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Downlink frequency chart (MHz)

Downlink	Digital	Analog Passband	Center
10 m	29.330
2 m	145.955-145.990	145.805-145.955	145.880
70 cm	435.900-436.200	435.475-435.725	435.600
13 cm	2400.650-2400.950	2400.225-2400.475	2400.350
3 cm	10451.450-10451.750	10451.025-10451.275	10451.150
1.5 cm	24048.450-24048.750	24048.025-24048.275	24048.150

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Beacons (MHz)

	Beacon 1	Beacon 2
2 m	none	none
70 cm	435.450	435.850
13 cm	2400.200	2400.600
3 cm	10451.000	10451.400
1.5 cm	24048.000	24048.400

Other: 146.898 MHz (400 bps telemetry)

Also carries a Laser IR experiment (835 nm, 0.5 W)

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