Observations

• Changes 16-18 Jan 98
• Changes 26-28 Jan 98
• Sun Avoidance
• Calculating the telescope FWHM from planet observations (23 Nov 2000)
• Focus Positions for the Four-Color Bolometer
• Change the continuum channel used by Chef and Toolbox
• Changes to the SHOW command (1 Apr 1998)
• Changes in Chef & OBST to accomodate Two-Channel Receivers (11 Dec 1997)
• Button Scheme for CONTROL (Sep 1999)
• Measuring efficiencies at the HHT (Dec 1998)
• Filterbank Sample Times vs Wobbler Chopping Frequency
• Making & Displaying a Focus Drift Scan Observation (20 Apr 2000)
• Software Frontend Scheme (27 Jan 1998)
• Measuring the Azimuth Axis Tilt with the Inclinometer (29 Nov 2000)
• Automatic Inclinometer Adjustment of the Pointing Model (15 Feb 2002)
• Leap Second
• Updated Line Pointing at the SMT (Jun 1998)
• Line Pointing at the HHT (file:linepointing_old.doc) (Mar 1997)
• Error messages from the local axis control micros (Jun 1994)
• OBSINP commands that reference global memory
• Optical Telescope Focus Backlash (Jun 2000)
• Optical Pointing (28 Feb 2002)
• Change the pointing model
• Directions for Taking Pointing Data (11 Oct 1996)
• Combination of pointing fits in CHEF across several scans
• Calculating New Pointing Model Constants (20 Dec 1996)
• Making a Plot of the Sky Distribution of Pointing Observations (25 Apr 2000)
• Instructions for Analysing Total Power Skydips (6 Mar 1998)
• Alerting Sounds at the HHT (2 Feb 2001)
• Topology of the drive program
• Tuning the sky frequency for VLBI observations (11 April 2002)
• Running OBST from a special terminal emulator window for VLBI (15 April 2002)
• Checking and Setting the Wobbler Frequency and Blanking Time (13 May 1997)
• Focus Difficulties (24 Apr 2000)

Computer-related

• SMT Backup Scheme (18 Dec 1996)
• Dumb Terminal in the Computer Room (26 Apr 2002)
• Cronjobs on the Unix workstations (24 Apr 2002)
• HHT data format (Jan 2000)
• Output to SCU (17 Feb 1994)
• Procedure to follow when Frankenheim has a problem (10 Sep 2001)
• ISC commands sent by CONTROL (19 Sep 2001)
• krupp.doc
• Ping on Mt. Graham (13 Jun 2001)
• Printers at the HHT (15 Feb 2001)
• Raw Header and Subscan Data Stored as One File per Scan (raw_merged.doc) (27 Aug 1997)
• Raw Header and Subscan Data Stored as One File per Scan (raw_progs.doc) (27 Aug 1997)
• Restoring Raw Data from Tape (16 Jan 2002)
• Raw Data Archiving Script
• ADC module
• Main output to the servo
• TCP Socket Library (6 Nov 2001)
• SSH on VMS (16 Apr 2001)
• Setting up the Terminal Server(s)
• Backend Time Stamps and TMSTMP Errors (18 Mar 2002)
• How to Give VMS Access to a Unix Tape Drive
• Notes on the Priorities of the Various Observing Programs

Receivers & Backends

• Recycling the 4-color bolometer (19 Feb 1998)
• Procedure to take and analyze Allan Variance Data (20 Mar 2001)
• AOS output register and connected functions
• Control of the AOS Buttons via the VAX (4 Dec 2001)
• Backend Maintenance (12 Mar 2001)
• Reset and OBST Commands for Chirp Transform Spectrometers (29 Nov 2001)
• Changes to Drumbeat (Aug 1996)
• Boot parameters for the Filterbank VxWorks CPU (31 Jan 2002)
• OBSINP-CLASS-FRONTPANEL FBS Numbering
• Control of the MPI facility Schottky/SIS frontends (Jun 1992)
• Boot parameters for the Frequency Generator VxWorks CPU (31 Jan 2002)
• Syntax of synthesizer commands (19 Apr 2002)
• Using Synthesizer #2 for the Phase Lock Loop (26 Mar 1997)

Telescope, Building etc.

• Monitoring the building drive currents (16 Nov 2001)
• Measuring the position of the building-antenna limit switches (04 Oct 2001)
• Checking the Consistency of the two Elevation Encoders
• Setting the Antenna Encoder Zero Points
• HHT Focus Translation and Directions for Manual Movement (13 Jun 1997)
• Move the building and let the telescope follow (16 Nov 2001)
• Horizon, as seen from the Sun Avoidance Camera - Files & Plots (12 Oct 2001)
• Summary of Status Registers (30 Nov 2000)
• switch.doc
• Telescope Tilt (2 Mar 2001)
• Manual Subreflector Chopping (18 Oct 1994)
• Turning on the UPS after its Batteries are Drained

Weather Data

• Inputting weather data manually (30 Oct 2000)
• Monitor Programs for Radiometer, Weather, and Wind (4 Nov 1997)
• Output of Tipping Radiometer PC Program
• If the tipper is broken ...
• CLASS macro for zenith opacity

Data Reduction

• How to calibrate the 19-channel array for data reduction (17 Jan 2002)
• LISTCAL - A CLASS Macro for Summarizing Calibration Scans (30 Jan 2001)
• tsys.class - Computing Tsys for a range of radial velocities from a calibration scan (1 May 2002)

Last modified: Dec 20, 2005
Contact: Thomas Folkers