File : ant_clock.y Updated : 04dec95 by mclaussen : 20dec95 by mclaussen : 02jan96 by mclaussen Note: On Nov 30, 1995, Ken S. made a test of switching MLO racks at the VLA. This required a re-sync of the L108 module on the VLBA DAR which occurred on Dec 1, 1995 just before project BB043 began. On Dec 15, a jump in the station timer occured to -31 microsec. Seems as if someone deliberately resynced the L108 to the Rb. On Dec 17, before GR012, I resynced it back to L35 (VLA secure tick. Should expect GR012 to show up where it should be. On Dec 20, the VLA switched from the EFOS maser to a VLBA Sigma Tau maser. We'll expect a clock jump between GR012 and BG047. Pro- MkIII/ Y1/ 1995 Wave- Clock Rate ject VLBA Y27 UT Start length Antenna Pad (microsec) sec/sec ------------------------------------------------------------------------------- BB043 VLBA Y27 DEC01 17:00 4cm all --- -235.019 1.1096e-13 DEC02 05:00 AP296D VLBA Y27 DEC07 17 4cm all --- -------- ---------- DEC07 22 BG041 VLBA Y27 DEC09 22:00 6cm all --- -234.940 1.1096e-13 DEC10 06:00 BP026C VLBA Y27 DEC12 02:30 4,6cm all --- -234.919 1.1096e-13 DEC12 09:30 GR012 VLBA Y27 DEC18 04:30 multi all --- -234.861 1.1096e-13 DEC18 22:30 BG047 VLBA Y27 DEC22 20:30 1cm all --- -239.636 -1.7886e-14 DEC23 03:30 BS019A VLBA Y27 DEC23 14:00 1cm,7mm all --- -239.637 -1.7886e-14 DEC23 22:00 BD027 VLBA Y1 DEC29 18:00 7mm 27 -4.587 -1.7886e-14 DEC30 18:00 BL030 VLBA Y27 DEC31 00:00 6cm all --- -239.648 -1.7886e-14 DEC31 19:00 -------------------------------------------------------------------------------