AMSAT OSCAR 40

This page gives Orbital and Frequency information for the AMSAT OSCAR40 (Phase 3D) spacecraft. AMSAT OSCAR 40 / AO-40  is an International Amateur Radio spacecraft. This is largest and most complex amateur radio satellite ever built.


Orbital Information

AO-40's planned orbit is highly elliptical (approximately 47000 km x  4000 km) with the orbital plane inclined 63.4 degrees to the equator. Apogee will be in the Northern hemisphere approximately 45 degrees (along the orbital track) from the equator.

AO-40 was inserted into a Geosynchronous Transfer Orbit (GTO) by Ariane 5 Flight 135 launched from the European Space Agency (ESA) facility in Kourou, French Guiana on 2000-NOV-16 0107:00 UTC.

Estimated orbital data is available in State Vector, Two-Line Element (TLE), and AMSAT Keplerian Element format.

Picture
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Stan Wood WA4NFY, the AMSAT-NA VP for Engineering, Ken Ernandes, N2WWD, and Lou McFadin W5DID, Phase 3D Integration Lab Manager discuss spacecraft constraints affecting orbital maneuver planning.

Uplink Frequencies

Band

 Digital MHz

Analog MHz

Center MHz

15m  HF

-

21.210 - 21.250

21.230

12m HF

-

24.920 - 24.960

24.940

2m VHF

145.800 - 145.840

145.840 - 145.990

145.915

70cm UHF

435.300 - 435.550

435.550 - 435.800

435.675

23cm (1) L-Band

1269.000 - 1269.250

1269.250 - 1269.500

1269.375

23cm (2) L-Band

1268.075 - 1268.325

1268.325 - 1268.575

1268.450

13cm (1) S-Band

2400.100 - 2400.350

2400.350 - 2400.600

2400.475

13cm (2)

2446.200 -2446.450

2446.450 - 2446.700

2446.575

6cm  C-Band

5668.300 - 5668.550

5668.550 - 5668.800

5668.675

Downlink Frequencies

Band

Digital MHz

Analog MHz

Center MHz

2m VHF

145.955 - 145.900

145.805 - 145.955

145.880

70cm UHF

435.900 - 436.200

435.475 - 435.725

435.600

13cm S-Band

2400.650 - 2400.950

2401.225 - 2401.475

2400.350

3cm  X-Band

10451.450 - 10451.750

10451.025 - 10451.275

10451.150

1.5cm  K-Band

24048.450 - 24048.750

24048.025 - 24048.275

24048.150

All downlink passbands are inverted from the uplink passbands

Beacon Frequencies

Band

Beacon-1 MHz

Beacon-2 MHz

Beacon-3 MHz

2m VHF

-

145.880

-

70cm UHF

435.450

435.600

435.850

13cm S-Band (1)

2400.200

2400.350

2400.600

13cm S-Band (2)

2401.200

2401.350

2401.600

3cm  X-Band

10451.000

10451.150

10451.400

1.5cm  K-Band

24048.000

24048.150

24048.400

All beacons can be modulated with 400 bits per second Binary Phase Shift Keying (BPSK).

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AMSAT OSCAR 40 is the amateur radio "Super Satellite"

The spacecraft will operate from a highly eccentric Molniya orbit

The Earth surface footprint will vary from 19% coverage at low altitude to 44% at high altitude

Uplink and downlink frequency passbands are in the tables below

The transponder "IF Matrix" can mix and match uplink and downlink bands (as long as they're not the same

Phase 3D has both Analog and Digital capability