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The logview program extracts and displays data from the GBT data log files. Note that this version replaces the logview program that was written in glish. The glish-based program is still available as logview-glish.

Usage:

• To access this program, type logview from the command line of any GB Unix machine, or
• Select LogView from the list of available application components in Astrid.

Features:

• User can select time range by most recent OR by relative time OR by start and end times.
• Handles archived log files (.gz)
• Can overlay additional plot on top of previous plots
• Basic math transformations can be specified on the axes, e.g., 1.8*Y1+32 for Fahrenheit or numarray.log10(Y1)
• User can select samplers by directory location or by aliases as specified in .sparrow file. The form for specifying a sampler alias in the file is alias_name : sampler_name. The default aliases, which will be available if you DO NOT have a [Logs] section in your personal. sparrow file, are:
  • ccuData: Antenna-AntennaManager-ccuData
  • el50HzServo: ServoMonitor-ServoMonitor-elServo50Hz
  • azElCommands: Antenna-AntennaManager-azElCommands
  • accelerometer: ServoMonitor-ServoMonitor-Spare50Hz
  • Subreflector Actuators: Antenna-AntennaManager-subreflectorAct
  • Subreflector XYZ: Antenna-AntennaManager-subreflectorXYZ
  • Weather1 (At ICB): Weather-Weather1-weather1
  • Weather2 (At GBT): Weather-Weather2-weather2
  • Weather3 (Feedarm): Weather-Weather3-weather3
  • GBT Az/El: Antenna-AntennaManager-ccuData
  • RcvrPF_1: RcvrPF_1-RcvrPF_1-cryogenics
  • RcvrPF_2: RcvrPF_2-RcvrPF_2-cryogenics
  • Rcvr1_2: Rcvr1_2-Rcvr1_2-gregorian
  • Rcvr2_3: Rcvr2_3-Rcvr2_3-gregorian
  • Rcvr4_6: Rcvr4_6-Rcvr4_6-gregorian
  • Rcvr8_10: Rcvr8_10-Rcvr8_10-gregorian
  • Rcvr12_18: Rcvr12_18-Rcvr12_18-gregorian
  • Rcvr18_26: Rcvr18_26-Rcvr18_26-gregorian
  • Rcvr40_52: Rcvr40_52-Rcvr40_52-gregorian
  • RxRm Temps: MotorRack-MotorRack-temperature
  • ActrRm Temps: ActiveSurface-ActiveSurfaceServo-temperature
  • OnePpsStatus: SiteTime-OnePps-OnePpsStatus
  • Rtpm GBT LO: SiteTime-Rtpm140-Rtpm
  • Tipper (Integrated): Tipper-Tipper-integratedData
  • Tipper (Slow Mon): Tipper-Tipper-slowMonitor
• If you prefer to limit the number of log files available to your personal instance of LogView, simply add a [Logs] section and place a subset of the descriptors outlined above below it, one per line.
• Samples are sorted and duplicates removed prior to plotting.
• Data may be plotted against two Y-axes.

Known Issues:

• At the present time, there is no way to export data in tabular form.
• The program may need protection from internal math errors caused by unexpected responses from the libraries Logview uses to plot and examine data.
• Units are not displayed
• No easy way to print

To Print a logview Plot via a file:

• Make the plot and be viewing it on the 'Graph' page.
• Open 'File > Export'.
• 'Name:' the plot with a .png extension.
• Make no directory selection to have the plot file saved in your home directory, or:
• 'Browse' for the 'folder' you wish to save the plot file in and double click the desired folder name.
• 'Save' the plot file.
• Abandon logview for the moment.
• Go to the directory/folder where you saved the plot file and open it with software that can open .png files.
• Print the plot.

-- MarkClark - 06 Nov 2007