----+----1----+----2----+----3----+----4----+----5----+----6----+----7----+----8
STAPOS
----+----0----+----0----+----0----+----0----+----0----+----0----+----0----+----0
COLUMNS FORMAT DESCRIPTION DEFAULT VALUE & UNITS
1-6 A6 STAPOS - Introduces station
position sub-group cards. The
station position sub-group contains
also optional station linear velocity
information.
7 I1 Coordinate system for adjustment 0
of stations and indicator that
all stations are to be adjusted
except those explicitly excluded
using the FIXED subgroup card.
= 0 Indicates no adjustment, or
adjustment of individual stations
will be indicated explicitly
by use of ADJUSTED cards.
> 0 Indicates that all stations for which
tracking data exists will be
adjusted unless explicitly
overridden by use of a FIXED card.
(Columns 25-72 must be a non zero)
Coordinate system for adjustment:
= 1 Geodetic - Phi,Lambda,Height
= 2 Cartesian - X,Y,Z
= 3 Cylindrical - S.A.D,Lambda,Z
= 4 Spherical - Phi,Lambda,R
8 I1 Station geodetic file indicator. 0
(Default is for geodetics file to be read
prior to reading station coordinates
following this STAPOS card)
= 0 Indicates stations will be read from
the station geodetic file on unit 16.
> 0 Indicates that no stations from the
station geodetics file are to be used.
9 I1 > 0 Value in columns 73-80 overrides
ELCUTOFF in Station Geodetics File
and sets new default until overridden
with ELCUTOFF following this card.
11-14 I4 Maximum number of configurations which 50
data is available in this run. [NOTE 1]
25-44 D20.8 Sigma for first station component 0.
as indicated by value in column 7.
(must be a non zero if col 7>0)
45-59 D15.3 Sigma for second station component 0.
as indicated by value in column 7.
(must be a non zero if col 7>0)
60-72 D13.1 Sigma for third station component 0.
as indicated by value in column 7.
(must be a non zero if col 7>0)
73-80 D8.2 Elevation cutoff override of Station
Geodetics File (see column 9).
NOTES:
[1] A configuration in GEODYN II is defined as a unique combination of
station-satellite-measurement type.
The valid STAPOS subgroup cards are listed below
ADJUSTED - Turns on station adjustment
CORREL - Station correlations
CONSTADJ - Start of constrained stations
CONSTEND - End of constrained stations
FIXED - Turns off station adjustment
GEODETIC - Defines station geodetic information
EXTRAGEO - Specifies planetary shape parameters
ELCUTOFF - Sets station elevation cutoff angle
INSTRMNT - Sets station antenna and operating frequency information
STATION COORDINATE CARDS - Station positions
STAVEL - Station velocities
TIMVEL - Reference time for station velocities
SIGVEL - Sigmas for adjusted station velocities
STATL2 - Station earth tide L2
STATH2 - Station earth tide H2
ENDSTA - End of STAPOS subgroup
The format of all cards in the subgroup is as follows:
A8,2I1,I2,I8,3D15.6,I5,10
There are two categories of stations:
1. Those adjusted (i.e., those which follow an ADJUSTED card).
2. Those not adjusted (i.e., those which follow a FIXED card).
Within the set of stations which are adjusted there are those which are
constrained to move together. A set of stations constrained to move as
a set can be defined as that set which is adjusted and which follows a
CONSTADJ card and precedes either a CONSTEND card or a FIXED card or an
ENDGLB card or the next CONSTADJ card.
The conditions stated on an ADJUSTED card or a FIXED card are imposed
until another ADJUSTED or FIXED card is encountered or an ENDSTA card is
encountered.
The conditions stated on a CORREL card apply only to adjusted stations
and are imposed until another CORREL card is encountered. (Default
correlations are zero).
The conditions stated on an ELCUTOFF card are imposed until another
ELCUTOFF card is encountered. (Default - ELCUTOFF is zero degrees.)
The conditions stated on an INSTRMNT card are imposed until another
INSTRMNT card is encountered.
The conditions stated on a GEODETIC card or an EXTRAGEO card are imposed
until another GEODETIC or EXTRAGEO card is encountered.
Station Location cards follow the appropriate cards of other types
necessary to specify the conditions that are to apply to those station
locations.
Station Location cards without values in the location data fields imply
that the location data is to be obtained from the Station Geodetics file
but that the other conditions indicated by the preceding STAPOS Subgroup
cards apply.
The STAPOS card can indicate the adjustment of all tracking stations not
explicitly excluded by the FIXED card. This includes stations obtained
from the Station Geodetics file if this file has not been specifically
excluded. If the adjustment of all stations has been requested using
the STAPOS card, then the ADJUSTED card may still be used to specify the
conditions of adjustment of particular subgroups of station coordinates.
Unless specified otherwise (using GEODETIC or EXTRAGEO) all stations are
considered to be located on the earth (see Keyword Option Card EARTH).
Station velocity cards (STAVEL) should follow immediately the station location
cards.
It is required that the station velocity group has the following sequence:
STATION POSITION CARD
STAVEL
TIMVEL
SIGVEL
If no velocity cards are present, GEODYN will apply zero velocities to the
stations, therefore extra velocity parameters will appear in the GEODYN
parameter summary printout.
Considering the station position and station velocity combinations, GEODYN will
handle:
a. Fixed positions/ fixed velocities
b. Adjusted positions/ fixed velocities
c. Fixed positions/ adjusted velocities
d. Adjusted positions/ adjusted velocities
No correlations are provided for station velocities.
Extra attention should be given at a setup with constraint stations. The
station velocity cards in this case should follow immediately the master station
and not the constrained station (station with data).
Cards like ADJUSTED and FIXED do not affect station velocities. Only the
presence of SIGVEL controls the adjustment of station velocities.
The STATL2 (or STATH2) cards should follow the station velocity group cards
or if there are no velocity cards this card must follow the station coordinate
cards, for example:
STATION POSITION CARD
(STAVEL)
(TIMVEL)
(SIGVEL)
STATL2
STATH2
STATL2 and STATH2 cards are independent of each other. The user can apply or
or solve for L2 or H2 or both per station. If the STATL2 (or STATH2) card is not
present for an individual station the solid earth tide corrections for this
station will either use the value from the L2LOVE card (or H2LOVE) if they are
present or the default GEODYN value if they are not present.
JUNE 1989
8906.0
STATION POSITION SUBGROUP