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Yohkoh Spacecraft Orbit

On 30-Aug-1991, Yohkoh was put into the nearly circular orbit of about 600 km altitude, 31 degree inclination, and 97 minutes period. Orbital elements of the Yohkoh satellite are archived in the Yohkoh database in the SolarSoft ($SSWDB/ydb/orbit_sol, $SSWDB/ydb/orb, etc). The location of the satellite is calculated with the following SolarSoft procedures.

Example:

;
; calculate S/C position as of 19-Apr-1992 01:22:46.5.
;
datim='19-apr-1992 01:22:46.5'
rd_orb,'19-apr-1992 01:00:00','19-apr-1992 02:00:00',orb_data
help,orb_data    ;     S/C location at every 5 min.
;
;*** interpolation ***
datim_sec=anytim(datim)
timarr=anytim(orb_data)
lat=interpol(orb_data.lat,timarr,datim_sec,/spline)
lon=interpol(orb_data.long,timarr,datim_sec,/spline)
hgt=interpol(orb_data.height,timarr,datim_sec,/spline)
rad=interpol(orb_data.radius,timarr,datim_sec,/spline)
;
print,'lat:',lat
print,'lon:',lon
print,'height:',hgt
print,'radius:',rad
;
end


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