Tracking data measuring the azimuth pointing errors due to the central bearing defect have been obtained on the dates shown in the table. Click on the date for the report, or on the resulting amplitude for a plot of the data.

The amplitude of the empirical correction was

• 11.5" originally ,
• 15" on 980421 (day 476)
• 11" on 980705 (day 551)
• 14" on 981012 (day 650)
• ~7" on 990127 (day 737)
• 17.8" on 990304 (day 793)
• 12.7" on 990403 (day 823)
• 10.0" on 990428 (day 848)