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TECHNICAL DESCRIPTION INTRAC-305
Page 60 INTRAC-305 MANUAL - Issue 3.2 © 2011 Advantech Wireless
IESS Minutes Interval range: 0 to 59
IESS Days Validity range: 0 to 28
IESS Sat LM0 range: 0 to 360 deg
IESS Sat LM1 range: -9.99 to 9.99 deg/day
IESS Sat LM2 range: -9.99 to 9.99 deg/deg/day
IESS Sat LONC range: -9.99 to 9.99 deg
IESS Sat LONC1 range: -9.99 to 9.99 deg/day
IESS Sat LONS range: -9.99 to 9.99 deg
IESS Sat LONS1 range: -9.99 to 9.99 deg/day
IESS Sat LATC range: -9.99 to 9.99 deg
IESS Sat LATC1 range: -9.99 to 9.99 deg/day
IESS Sat LATS range: -9.99 to 9.99 deg
IESS Sat LATS1 range: -9.99 to 9.99 deg/day
IESS Sat LONG170 range: 0 to 360 deg
IESS Sat LAT170 range -9.99 to 9.99 deg/day
Also required to be set are the IESS Az & El offsets which are
input on the Function - System Setup - Station Coordinates
menu screen.
The IESS Epoch defines the time instant at the start of the
period of the IESS data. The IESS Minutes Interval defines the
period in minutes between pointing updates in Program Track
mode. The IESS Days Validity (normally 7) defines the period
of validity of the data. The INTRAC will accept and use the
data two days either side of the validity period.
The parameters IESS Sat (LM0, LM1, LM2, LONC, LONC1,
LONS, LONS1, LATC, LATC1, LATS, LATS1) are the IESS-
412 11-element ephemeris. The parameters IESS Sat
(LONG170, LAT170) are the IESS-412 11-element ephemeris
170hr parity check.
Note The data ranges shown above as +/- 9.99 actually accept more
than two places of decimals.
Note The LMO value is given in the range -180 to +180. The
INTRAC-305 cannot accept negative values for this field from
the front panel. (It can accept them from the RCM-4). It is
therefore necessary to add 360 to the supplied value if it is