VLBA RFI Bulletin 18: GPS Jamming Continues at WSMR in November: Scheduled testing of GPS jamming equipment will continue at the White Sands Missile Range during November, 1998. The GPS jamming tests are scheduled for Tuesdays, Thursdays, and Saturdays (except Saturday, 981128). Observers using the VLBA-PT and VLBA-LA receivers should expect an increased chance of RFI at the 2 GPS frequencies of 1575 MHz (L1) and 1228 MHz (L2) during the scheduled jamming times. The detailed schedule for November, 1998 follows: Tuesdays: 0601 UTC to 1000 UTC Thursdays: 0601 UTC to 1000 UTC