GBT OPERATIONS PROCEDURES

Number: 853-03

Title: Stowing 85-3 for High Winds

Last Revision: 28 MAR 03

1

Enter the gbiop password to unlock the screen saver on Marsha (Linux machine in USNO control room closest to the door to the server room).

2

Click on the "Halt" button on the T85_3 window.

A popup window should appear asking "Do you really want to perform a halt".

3

Click on "yes".

4

Click on the Obs Mode "Halt" button and select "Stow" from the drop-down menu.

The antenna should slew to stow position of 00:00:00 HA and 38:26:06 DEC and the brakes should set (indicated by the red highlighted Brakes "On" for each axis). There is no stow pin to insert.

5

Click on the lock picture on the status bar at bottom right corner of the screen to lockout the terminal.

6

Make note of the time you halted observing on the 85-3 paper log in the "<O>ther" section and charge it as lost time due to weather. The Logbook is kept on the desk beside osiris. Also add an info. comment in the GBT OPSLOG program that you halted observing on 85-3.

7

Wait at least 1/2 hour after winds have subsided before putting the antenna back on line per 85-3 Startup Instructions.

NOTE: If you have been offline for an extended amount of time and the temperatures are in the teens or below, call Pete before putting the antenna back online.

8

Log the re-start time on the paper log and in the GBT OPSLOG program.

9

Make note of the shutdown on the Operator's white board in the GBT control room if still offline at the end of your shift.