Time-Tag Errors in Ashtech L2P-Codeless Receivers (Early 1990's Data) In the course of analyzing survey-mode data acquired between 1991 and 1996 by the USGS, NIMA, and university groups in southern California, MIT analysts noted an apparent bias in... Read More

Ashtech Micro-Z, ICGRS, and Z-12 Resource Page Back to receiver comparison page Receiver GNSS ? Available as special buy Available on loan Serviceable at UNAVCO File Size (24 hr, 15 s) Memory Time lasts recording at 15 s Power draw w/... Read More

Ashtech Micro-Z Interface Protocol Quick Reference System Default Settings Serial port baud rate: 9600, 8, N, 1 Clock steering: Enabled Raw data output rate: 20.0 sec Once new values are set they can be saved to memory by issuing a $PASHS,SAV,Y... Read More

Ashtech Z-12 - How to configure for static/ rapid static surveys General Notes Turn on the unit with the toggle switch in the back of the unit. The menu currently displayed is shown by the highlighted number in the bottom right-hand corner of the... Read More

Ashtech Z-12 - How to configure to stream for VSAT Go through these instructions with a receiver in front of you. Turn it on in back Press number "4" on keypad Press "e" Navigate with arrow keys. When you press the arrow keys, you will notice that ... Read More

At 23:59:42 UTC on 4/6/2019 (Midnight GPS time, which differs by 18 leap-seconds from UTC) , the 10-bit GPS Week Number broadcast by the constellation reset to zero for the second time since the beginning of GPS on 1/6/1980.  The official... Read More