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AO-85 (FOX-1A) OPERATIONAL DETAILS
AO-85 (Fox-1A) Operational frequencies and other details

Spacecraft Summary  

  

OSCAR Designation: 

AMSAT-OSCAR 85

   

Oscar Number: 

AO-85

   

International Designator: 

2015-058D

   

Norad Number: 

40967

   

Common Name: 

Fox-1A

   

Alternate Name: 

Fox-1A

   

Satellite Type: 

CubeSat

   

Launch Date: 

8 October 2015

   

Launch Location: 

Vandenberg AFB

   

Launch Vehicle: 

Atlas-5(401)

   

Apogee: 

795.8

   

Perigee: 

508.6

   

Inclination: 

64.8

   

Period: 

99.97

   

Dimensions: 

10 cm X 10 cm X 10 cm

   

Weight: 

1.33 kg

   

Organization: 

AMSAT-NA

  

Frequency Information

 

Uplink (MHz): 435.170
Downlink (MHz): 145.978
Beacon (MHz): 145.978
Mode: FM CTCSS 67.0Hz/200bps DUV/9k6 FSK
Call sign:
Status: Active

 

Suggested pre-programmed channel frequencies for a typical AO-85 repeater mode pass.

 

Transmit
Frequency (with
67 Hz tone)
Receive
Frequency
AOS (Mem.1)  435.170 MHz 145.980 MHz
Approaching (Mem.2)   435.175 MHz 145.980 MHz
Passing (Mem.3)   435.180 MHz 145.980 MHz
Departing (Mem.4)   435.185 MHz 145.980 MHz
LOS (Mem.5)   435.190 MHz 145.980 MHz

The original AO-85 (Fox-1A) frequencies were significantly different from the frequencies shown above. See below notes:

Measurements after launch indicate these centre frequencies may be a better choice:
435.170 MHz (+/- 10 kHz Doppler shift) FM Uplink 67 Hz CTCSS PL tone required
145.978 MHz (+/- 3 kHz Doppler shift) FM Downlink
Note: If your rig has selectable FM filters use the wider filter for 5 kHz deviation 25 kHz channel spacing.

David Bowman G0MRF reports that the AO-85 downlink appears to be 2 kHz low of the nominal frequency on about 145.978 MHz. This suggest that for those with radios which have 5 kHz tuning steps best results might be obtained by tuning to 145.980 MHz at the start of the pass and then tuning to 145.795 MHz mid-way through the pass.

Measurements made by Alan Biddle WA4SCA indicate the downlink is consistently 1.400 kHz low at 145.9786 MHz. Reports indicate the uplink may be 10 kHz low of nominal frequency 435.170 MHz.

 

See AMSAT for latest Operational OSCAR Satellite Status Summary
http://www.amsat.org/amsat-new/satellites/status.php

 

See AO-85 (Fox-1A) details: http://www.amsat.org/?page_id=4690

 

 

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Page last revised 16 June, 2016
 

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