From: Ken Hudnut, USGS - Pasadena Date: 12 Jan 1996 11:50:20 Subject: [SCIGN-0140] USGS Near Real-Time Auto Processing ****************************************************************************** SCIGN Electronic Mail Fri Jan 12 11:50:20 PST 1996 Message Number 0140 ****************************************************************************** Author: Ken Hudnut, USGS - Pasadena Subject: USGS Near Real-Time Auto Processing As of now, the data from USGS stations in the SCIGN network's Dense GPS Geodetic Array in the Los Angeles region are being processed within one day after downloading by the USGS in Pasadena. As a test, the rapid solutions from the Pacoima Dam 'pilot' study are now on the WWW at: The stations that I am now processing in near real-time at the USGS Pasadena office are: CHIL, CLAR, CMP9, HOLC, HOLP, LEEP, LONG, ROCK, DAM1, and DAM2. I anticipate adding other stations of the LA array once this test has proven to be operational. Initial comparisons between these rapid solutions and the regional DGGA solutions by SOPAC that are performed later, with their final orbits, indicate that the rapid solutions disagree at the worst by 5 mm in horizontal components and 15 mm in vertical component (for bias-fixed solution baseline components). This is the case even for the longest baselines I am now processing. Additional station and baseline data in near real-time will be added to the WWW pages soon, and the main USGS Pasadena GPS home page will provide updated links to new pages. UNIX scripts for automated GAMIT processing (for these rapid solutions) are available to anyone interested. The script sh_auto and several cron drivers are more specific to this particular task than some of the gamit/com scripts. I'd like to thank Peng Fang, Burc Oral, Jeff Behr, Eric Calais, and many others for making their com scripts available. The near real-time automated processing became much more feasible with the 9.4 GAMIT release, and I'd like to thank everybody that worked on that. [Mailed From: Ken Hudnut ]