[IGSMAIL-1287] New Daily Status Files on CDDIS
CDDIS/Carey
CDDIS/Carey
Wed Apr 24 11:41:36 PDT 1996
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IGS Electronic Mail Wed Apr 24 11:41:36 PDT 1996 Message Number 1287
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Author: CDDIS/Carey Noll and Maury Dube
Subject: New Daily Status Files on CDDIS
The CDDIS staff has recently developed software to create and maintain
daily status files of GPS data holdings. The automated archiving procedures
currently executed at CDDIS have been modified to execute the quality checking
(QC) program developed by UNAVCO that analyzes the daily observation files and
generates summary files containing various statistics on these data. Routines
then browse these summary files and update the daily status file with
statistics on number of data points, cycle slips, and multipath. Furthermore,
information from the RINEX header, such as receiver and antenna type, antenna
height, marker name and number, are included to provide checks against the
system configuration information available through the IGS Central Bureau
Information System (CBIS). Data latency (in hours) is also computed and
provided for each station. Replacement data will be processed and reflected in
this file by way of a version column. The daily status files will be loaded
into the CDDIS data base for reporting purposes. The staff can then easily
generate reports on the timeliness of data deliveries and data quality of the
IGS stations. The user community can receive a quick look at a day's data
availability and quality by downloading a single status file.
The filename of this daily status file is of the form yyddd.STATUS, where
yy is the two-digit year and ddd is the day of year. These files are stored on
CDDIS in the daily subdirectories (i.e., GPS1:[GPSDATA.yyddd]). Status files
created after day 96113 can be considered "operational"; early files were
generated during software tests and may not be complete or correct. An excerpt
from the status file for day 96113 is included below. The file is currently
132 characters in width.
The summary files created by the QC program are also stored on the CDDIS,
and will soon replace the CDDIS-generated summary file. These summary files
are of the form ssssddd#.yyS_Z, where ssss is the four-character monument name
and # is the file sequence number for the site for that day (typically 0).
The summary files are stored in daily subdirectories, GPS1:[GPSDATA.yyddd.yyS].
Many thanks to Gerry Mader (NOAA/GRDL) and Werner Gurtner (AIUB) for their
original proposals for this activity and review of the status charts during the
creation process. The CDDIS staff hopes the user community will find this new
reporting method useful and encourages suggestions and comments that could
possibly be incorporated in future versions.
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IGS Tracking Network Status for 22-Apr-96 960422 96113 GPS Week 0850 Day 2 As of date: 24-APR-96 09:55:43
Dly No. No. Pts. Avg. Avg. Pos. No. Ant. Marker
Site (H) Exp. Obs. Del. % MP1 MP2 Diff Slps V Receiver Type Antenna Type Height Marker Name Number
---- --- ----- ----- ----- --- ---- ---- ---- ---- - -------------------- -------------------- ------ -------------------- ---------
ALBH 6 20306 19883 155 98 0.40 0.58 0.04 40 1 ROGUE SNR-8000 DORNE MARGOLIN T .10 albh WCDA-ACP 927000 40129M001
ALGO 6 20170 19166 520 95 0.36 0.76 0.09 40 1 ROGUE SNR-8000 DORNE MARGOLIN T .10 algo CACS-ACP 883160 40104M002
ANKR
AOA1 19 20442 18540 2008 91 0.38 0.61 0.03 43 1 ROGUE SNR-8000 DORNE MARGOLIN T 0.1016 AOA1 AOA1
AREQ
AUCK 18 20220 18896 2482 93 0.23 0.62 0.06 39 1 ROGUE SNR-8000 DORNE MARGOLIN T 0.0018 AUCK AUCK
BOGT 21 22522 17735 1573 79 0.43 0.97 0.27 101 1 ROGUE SNR-8000 DORNE MARGOLIN T 0.1630 BOGT BOGT
BOR1 33 20222 18492 991 91 0.29 0.65 0.12 18 1 ROGUE SNR-8000 DORNE MARGOLIN T 0.06 BOR1 12205M002
BRMU 4 20017 17385 3218 87 0.31 0.74 0.08 73 1 ROGUE SNR-8000 DORNE MARGOLIN T .00 BERMUDA 42501S004
BRUS 9 20168 20011 749 99 0.58 0.96 0.04 159 1 ROGUE SNR-8000 DORNE MARGOLIN T 3.97 BRUS 13101M004
.
.
.
ZWEN
Program: QC V3 by UNAVCO run with elevation angle cutoff of 10 degrees
Field Size Type Explanation
------------- ---- ------ --------------------------------------------------------
Site 4 char Site name
Dly (H) 3 number Delivery delay in hours
No. Exp. 5 number Total number of observations expected
No. Obs. 5 number Total number of observations in file
Pts. Del. 5 number Total number of points deleted
% 3 number Data collection percentage
Avg. MP1 4 number Average L1 multipath (rounded to two decimal places)
Avg. MP2 4 number Average L2 multipath (rounded to two decimal places)
Pos. Diff 4 number RINEX vs QC point position difference (Km)
No. Slps 4 number Number of detected slips
V 1 number Version of the data file (set to 1 for initial delivery)
Receiver Type 20 char Type of GPS receiver from RINEX header
Antenna Type 20 char Type of GPS antenna from RINEX header
Ant. Height 6 number Height of antenna from RINEX header
Marker Name 20 char Marker name from RINEX header
Marker Number 10 char Marker DOMES number from RINEX header
[Mailed From: Carey Noll 301-286-9283 <NOLL at CDDIS.GSFC.NASA.GOV>]
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