Subject: [IGSMAIL-1287] New Daily Status Files on CDDIS
From: CDDIS/Carey Noll and Maury Dube
Date: Wed, 24 Apr 1996 11:41:36 PDT

******************************************************************************
IGS Electronic Mail      Wed Apr 24 11:41:36 PDT 1996      Message Number 1287
******************************************************************************

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. 
************************************************************************************************************************************
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 <[email-masked]>]