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Example of e-mail query to JPL


Send an e-mail with the below body/content/template. Remember to look at:

Remark: The apparent altitude of the centre of the object (Elev_(r-appr)) in R_T_S_ONLY='GEO' results of JPL is not equal to ELEV_CUT because;
  1. in R_T_S_ONLY='GEO' the ELEV_CUT is the rise and set apparent altitude of the upper rim of the object and
  2. JPL determines set/rise times using fixed interval steps of 1 minute.
Cut and paste the below including the !$$SOF and !$$EOF lines into an e-mail.

!$$SOF (ssd)       JPL/Horizons Execution Control VARLIST    September

 START_TIME = '2006-JAN-01 00:00 UT'
! Add BC in front of year number in case a date before year 1
  STOP_TIME  = '2006-DEC-31 23:59'
 STEP_SIZE  = '1 m'
 COMMAND    = '301'
! MOON
! COMMAND    = 'SUN'
! SUN
SITE_COORD = '-6.5,53.7167,0.06'
! Knowth: longitude, latitude, height [km]
! North and East are positive
 ELEV_CUT   = '0'
! The apparent altitude of the horizon
! R_T_S_ONLY = 'NO'
! get every STEP_SIZE information
 R_T_S_ONLY = 'GEO'
! determine rise/transit/set times only, using geometric horizon
 OBJ_DATA   = 'NO'
 MAKE_EPHEM = 'YES'
 TABLE_TYPE = 'OBS'
 CENTER     = 'coord'
 REF_PLANE  = 'ECLIPTIC'
 COORD_TYPE = 'GEODETIC'
 QUANTITIES = '4,10'
 REF_SYSTEM = 'J2000'
 OUT_UNITS  = 'KM-S'
 VECT_TABLE = '3'
 VECT_CORR  = 'NONE'
 CAL_FORMAT = 'CAL'
 ANG_FORMAT = 'HMS'
 APPARENT   = 'REFRACTED'
 TIME_DIGITS = 'MIN'
 TIME_ZONE   = '+00:00'
  SKIP_DAYLT = 'NO'
 AIRMASS    = '38.0'
 EXTRA_PREC = 'NO'
 CSV_FORMAT = 'YES'

!$$EOF+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++


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Last major content related changes: Jan. 9th, 2003