Operations Status Help Page
The 43m Tracking Station
at NRAO Green Bank
West Virginia, maintains an online status summary of the activities
of the station. This summary is updated every few seconds
and provides a complete summary of the station activities.
Use the RELOAD/REFRESH button if the display is not changing.
The first line of the station summary table describes two ASCII input
files, and the GPS time which are:
The commands are Dispatched by a realtime task and the
orbit is used by the Geometry task to calculate the
antenna angles and link frequencies.
- Station Commands implementing the Global Schedule
of Events specified by the mission operations center.
- Satellite Orbit prediction calculated by the Ionspheric Research Groups.
The inputs to the realtime system are processed versions of the
Global inputs, conforming to the real time system input specifications.
Offline NRAO programs run to convert the global files to
the internal file formats. The command files next two commands to be
executed are displayed along with the UTC time when they will be
Monitor and Checking Task: Anomalies
A single line displays the anomalies currently detected by the
MONCHK task which monitors and checks the station hardware and software.
If an anomalous condition exists, it may have one of 4 levels,
A number of anomalous conditions occur when the system changes state,
(from idle to tracking, etc) so the monitoring task is temporarily suspended
during these changes. If anomalous conditions exist, then the first
6 of them will be displayed.
- WARNing: A condition exists which possibly could in the future
cause a problem.
- ERROR: A condition exists which is likely to cause a lost of tracking
The condition may clear automatically and but be
addressed if the condition persists for longer than 10 minutes.
- SEVERE: A condition exists which is certainly causing a lost of tracking
data, and should be addressed immediately.
- EMERGENCY: A hardware and/or personal danger exists, which must be
addressed immediately. If the condition persists permanent damage may
The Antenna azimuth, elevation and status are displayed continuously.
The normal idle condition is with the brakes on and accepting computer
2006 October 18