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This procedure covers the basic steps to prepare the 43 Meter (140 Foot) telescope for movement, either observing or maintenance.
Ensure personal safety through effective lockout/tagout procedures. Ensure the antenna is cleared for movement before releasing hydraulic drive brakes.
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This procedure covers basic steps for operating the 43 Meter Telescope.
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- The computer host for the 43 Meter control software is WASAT (located in rack below Annunciator panel).
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- WASAT is used primarily to control the telescope for maintenance activities. It's also used to take/release control from/to the 43 Meter Antenna Control interface for observing.
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- To access the WASAT Help Menu, type h or help in the user command input window.
- The 43 Meter Antenna Control screen is used to monitor/control the telescope for observing.
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- The 43 Meter Antenna Main Console window is used to monitor/control the telescope for manual moves and automated observing.
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| Service | -106.204 | -14.553 |
| Snow1 (East) | -100 Deg | -10 |
| Snow2 (West) | 100 Deg | -10 |
| STEP | ACTION |
|---|
| 1 | Obtain the antenna drives lockout key and insert in the control panel. Turn to ON position. |
| 1 | Release the Declination axis Stow brake. |
| 2 | Release the Polar axis Stow brake. |
| 3 | Press the Center button for Declination axis. |
| 4 | Press the Center button for Polar axis. |
| 5 | Press the Anti-Backlash On button for both axes. |
| 6 | Press the Control On button. |
| NOTE | Before releasing the Pol/Dec Gear Reducer brakes, ensure a monitoring program is running so you can monitor antenna movement! |
| 7 | Release the Pol/Dec Gear Reducer brakes. |
| NOTE | The antenna is now ready to control. |
Antenna Control Via Software on WASAT
| STEP | ACTION |
|---|
| NOTE 1 | No action required if WASAT is already running. |
| 1 | Turn on the monitor then turn on/boot the WASAT computer. |
| NOTE 2 | WASAT should come up to a ready state with wasat login: or Please enter a command displayed. If not, contact T. Weadon or J. Ford. |
| 2 | Press Alt F3 to toggle to the monitoring window; Press Alt F2 to toggle to the user command input window. |
| STEP | ACTION |
|---|
| 1 | To take control, toggle to the user command input window. Type take then press enter (You have taken control will be displayed). |
| 2 | To release control, toggle to the user input window. Type release then press enter (You have released control will be displayed). |
| NOTE | If releasing control for observing, ensure the rate mode is set to HIGH rate. |
| COMMAND | ACTION |
|---|
| take | Takes antenna control. The operator now has software control of the telescope. |
| release | Releases antenna control. Gives an observer software control of the antenna. |
| log | Starts logging of data. Used by technicians/engineers. |
| d or disable | Disables axis. Prompts for selecting Pol or Dec). |
| enable | Enables axis. Prompts for selecting Pol or Dec). |
| exit | Exits control software and shuts WASAT down. |
| max rate | Allows setting a maximum rate limit used while in Position mode. |
| system mode | Sets system mode to either Position or Rate. Drives must be disabled first. |
| rate mode | Allows selection of High or Low rate for use in Position mode. |
| position | Allows commanding to a specific POL or DEC position. Must be in Position mode. |
| rate | Allows commanding movement, either POL or DEC, at a specified rate. Must be in Rate mode. |
| Service | Commands antenna to the Service Tower position. Must be in Position mode. |
| Snow1 | Commands antenna to the East Snow Dump position. Must be in Position mode. |
| Snow2 | Commands antenna to the West Snow Dump position. Must be in Position mode. |
| Survival | Commands antenna to the Stow/Survival position. Must be in Position mode. |
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| Service Position | -106.204 | -14.553 |
| Stow East | -100 Deg | -10 |
| Stow West | 100 Deg | -10 |
CITECT Main Console Control Buttons
| BUTTON | ACTION |
|---|
| Remote Control | Disables the local console and enables the CITECT GUI R virtual buttons. You must be in REMOTE CONTROL to operate with computer control. |
| Local Control | Enables the local console. All computer control is disabled. |
| System Idle | Commands the PLC to take the system to the System Idle mode. System Idle is defined to be when the system pre-charge is on, the declination and polar drive motors are running, the stow brakes are set, and the hydraulics are set to bleed. |
| System Ready | Commands the PLC to take the system to the Ready mode. System Ready is defined to be the same as System Idle, except the stow brakes for both axes are released. |
| Manual | Basically the Operator’s "Take Control" button. This mode allows the Operator to manually move the antenna. |
| Auto | Allows the Observer’s program to "Get Control" of the antenna and run observing commands. This button can only be pressed when the system is in the Ready mode. |
| Halt | Commands the system to go from the Active state to the Ready state. Also causes the system to go to Manual mode. If the system is already in the Ready or Idle state, then nothing happens. |
| Idle | |
| Stow | Commands the antenna to HA = 0.0; Dec = 38.438 . This button is active only when in Manual mode, System Ready, and the axes are disabled. |
| Snow East | Commands the antenna to HA = -100 Deg; Dec = -10 . This button is active only when in Manual mode, System Ready, and the axes are disabled. |
| Snow West | Commands the antenna to HA = 100 Deg; Dec = -10 . This button is active only when in Manual mode, System Ready, and the axes are disabled. |
| Service Position | Commands the antenna to HA = -106.204; Dec = -14.553 . This button is active only when in Manual mode, System Ready, and the axes are disabled. |
| Low Rate | Sets rate as 10 deg/min max |
| High rate | Sets rate as 25 deg/min) |
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| 5 | Launch Peakups module: ACU (enter), PEAKUPS (enter) |
| 6 | Launch Baseband Converter module: MODULE (enter), BBC (enter) |
| 7 | Resize the entire window to a desired size then hit CTRL-R to refresh the modules for fit. |
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| NOTE | Resize the entire window to a desired size then hit CTRL-R to refresh the modules for fit. |
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| 1 | To launch, start PuTTY and SSH to host wasat; Log in as gbtops; Type 43mgui. The graphical antenna position display will appear. |
| 2 | To close, press CTRL-C then type a to abort the session. Exit from wasat to close the window/connection. |
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| 1 | To launch, start PuTTY and SSH to host prospero; Log in as gbtops; Type 43mgui. The graphical antenna position display will appear. |
| 2 | To close, press CTRL-C then type a to abort the session. Exit from prospero to close the window/connection. |
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-- DavidRose - 24 Jan 2006
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-- DavidRose - 26 Mar 2007 |
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BASIC ENABLING PROCEDURE
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BASIC ENABLING PROCEDURES
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This procedure covers the basic steps to prepare the 140 Foot telescope for movement, either observing or maintenance.
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This procedure covers the basic steps to prepare the 43 Meter (140 Foot) telescope for movement, either observing or maintenance.
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- The computer host for the 140 Foot control software is WASAT (located in rack below Annunciator panel).
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- The computer host for the 43 Meter control software is WASAT (located in rack below Annunciator panel).
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- WASAT is used primarily to control the telescope for maintenance activities. It's also used to take/release control from/to the 43 Meter Antenna Control interface for observing.
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- The 43 Meter Antenna Control screen is used to monitor/control the telescope for observing.
- The MIT-Lincoln Labs-NRAO Bi-static Radar Monitor is a web page used to monitor observing status. It's updated automatically every 8 seconds.
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-- DavidRose - 28 Oct 2005
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| STEP | ACTION |
|---|
| 1 | To launch, start PuTTY and SSH to host prospero; Log in as gbtops; Type rscreen deimos. The main shell for the antenna control screen will appear. |
| 2 | Launch ACU 43M module: ACU (enter), ACU (enter). Verify the A/M mode is set to Auto. |
| 3 | Launch Station Clock module: CLOCK (enter) |
| 4 | Launch Dispatch Commands module: DISPATCH (enter), COMMANDS (enter) |
| 5 | Launch Peakups module: ACU (enter), PEAKUPS (enter) |
| 6 | Launch Baseband Converter module: MODULE (enter), BBC (enter) |
| 7 | Resize the entire window to a desired size then hit CTRL-R to refresh the modules for fit. |
| NOTE | To quit the 43 Meter Antenna Control Screen, press CTRL-C then type a to abort the session. Exit from prospero to close the window/connection. |
| NOTE | These are the files used to run observing sessions and will end with .cmd . |
| 1 | From a Linux workstation, go to the mlln directory: cd ^ home/ovlbi1/mlln/in |
| 2 | Use the ls command to view the directory. |
| 3 | Use the more command to view the files. |
MIT-Lincoln Labs-NRAO Bi-static Radar Monitor
| NOTE | This monitor is an auto updating web page. To view it, simply open a web browser then go to: *www.gb.nrao.edu/mlln/operate/ |
-- DavidRose - 3 Nov 2005 |
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- The computer host for the 140 Foot control software is WASAT (located in rack below Annunciator panel).
- To access the WASAT Help Menu, type h or help in the user command input window.
- Stow/Survival = HA 0.0 Deg / DEC 38.438 Deg
- Service = HA -106.204 Deg / DEC -14.553 Deg
- Snow1 (East) = HA -100 Deg / DEC -10 Deg
- Snow2 (West) = HA 100 Deg / DEC -10 Deg
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| 6 | Press the Control On button. |
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| 6 | Press the Control On button. |
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Antenna Control Via Software on WASAT
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| NOTE 1 | No action required if the computer used to monitor/run the 140 Foot is already running. |
| 1 | Turn on/boot the 140 Foot control computer. |
| NOTE 2 | The control computer should boot up to a ready state. If not, contact T. Weadon or J. Ford. |
| NOTE 3 | Pressing Alt F2 toggles to the monitoring window. Alt F3 toggles to the user input window. |
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| NOTE 1 | No action required if WASAT is already running. |
| 1 | Turn on the monitor then turn on/boot the WASAT computer. |
| NOTE 2 | WASAT should come up to a ready state with Please enter a command displayed. If not, contact T. Weadon or J. Ford. |
| NOTE 3 | Pressing Alt F3 toggles to the monitoring window; Alt F2 toggles to the user command input window. |
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| 1 | To take control, toggle the user input window. Type the TAKE command then press enter (text will be displayed indicating you have taken control). |
| 2 | To release control, toggle to the user input window. Type the RELEASE command then press enter (text will be displayed indicating you have released control). |
| NOTE | If releasing control for observing, ensure the control software is setup for HIGH rate. |
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| 1 | To take control, toggle to the user command input window. Type take then press enter (You have taken control will be displayed). |
| 2 | To release control, toggle to the user input window. Type release then press enter (You have released control will be displayed). |
| NOTE | If releasing control for observing, ensure the rate mode is set to HIGH rate. |
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| take | Takes antenna control. The operator now has software control of the telescope. |
| release | Releases antenna control. Gives an observer software control of the antenna. |
| log | Starts logging of data. Used by technicians/engineers. |
| d or disable | Disables axis. Prompts for selecting Pol or Dec). |
| enable | Enables axis. Prompts for selecting Pol or Dec). |
| exit | Exits control software and shuts WASAT down. |
| max rate | Allows setting a maximum rate limit used while in Position mode. |
| system mode | Sets system mode to either Position or Rate. Drives must be disabled first. |
| rate mode | Allows selection of High or Low rate for use in Position mode. |
| position | Allows commanding to a specific POL or DEC position. Must be in Position mode. |
| rate | Allows commanding movement, either POL or DEC, at a specified rate. Must be in Rate mode. |
| Service | Commands antenna to the Service Tower position. Must be in Position mode. |
| Snow1 | Commands antenna to the East Snow Dump position. Must be in Position mode. |
| Snow2 | Commands antenna to the West Snow Dump position. Must be in Position mode. |
| Survival | Commands antenna to the Stow/Survival position. Must be in Position mode. |
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