Re: Geosat look angles

From: Bill Frost (billfrost@bigpond.com)
Date: Wed Apr 05 2006 - 21:39:55 EDT

  • Next message: Ed Cannon: "Re: Finding geosat passes in Heavens Above"

    Hi Kevin,
    
    Orbitron is a great little utility and it will calculate look angles for you (http://www.stoff.pl).
    
    As these are not 'passes' in the conventional sense, you can't generate predictions, but if you select the objects in your region from the geo.txt TLE, it will show the Az / El as in the sample below (0130 UTC) and you can flip from one to the next very quickly. Assuming geosat visibility follows the normal rules (sun's centre between -6 and -18 degrees below observer's horizon), this should guide you for best viewing time.
    
    APSTAR 1
    Lon	142.0566° E
    Lat	1.5014° S
    Alt (km)	35 782.570
    Azm	347.5°
    Elv	49.9°
    RA	23h 46m 47s
    Decl	3° 58' 07"
    Range (km)	37 078.158
    RRt (km/s)	0.000
    Vel (km/s)	3.075
    Direction	Descending
    Eclipse	No
    MA (phase)	47.5° (34)
    TA	47.5°
    Orbit #	4 286
    Mag (illum)	? (3%)
    Constellation	Psc
    
    Sun
    Azm	14.9°
    Elv	47.2°
    RA	00h 59m 22s
    Decl	6° 19' 33"
    Lon	159.2197° E
    Lat	6.3396° N
    Range (km)	149 690 197
    Constellation	Psc
    
    
    Cheers,
    
    Bill
    Canberra, Australia
    
    -------------------------------------------------------------------------
    Subscribe/Unsubscribe info, Frequently Asked Questions, SeeSat-L archive:  
    http://www.satobs.org/seesat/seesatindex.html
    



    This archive was generated by hypermail 2b29 : Wed Apr 05 2006 - 21:41:32 EDT