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30Nov07ServoTesting
Servo Tests 30Nov07 Friction Compensation Tests The intent of this test was to confirm that the modified friction compensator now uses a tanh() curve as velocity...
AddingNewYgorReceivers
Steps to Add a new RX to Ygor * Add the new RX name to ScanCoordinator.conf * Add an entry for the receiver in the antenna_pfm database receiver table. *...
AdventuresInOptimization
Adventures In Optimization A developing page on interesting optimization/compiler notes, as well as odd issues. General Optimizations: * Multi threading * V...
AntennaManagerAstrometryDesc
Notes on Antenna Manager Position Handling Introduction This is a quick description of the processing performed in the GBT antenna manager to transform sky based...
AntennaPointingProcess
A Quick Description of the Pointing Correction Process Flow This document describes a very high level view of the pointing correction process used by the GBT ante...
BTLMaintenanceNotes
Placeholder for BTL Maintenance Info From Ray 01/14/2016: * All the stuff resides and runs in /opt/dibas of host bl head, and the bc0 n compute nodes. * The...
BicyclingGBtoNC
Bicycling From Green Bank, WV to Kill Devil Hills, NC The route plan: Day Segment Gain (ft) Loss (ft) Miles Km Overnight Plans ...
CCUPerformanceNotesPh5K
Performance Notes Tests using simulated PLC and simulated EtherCAT yielded the following (times in us): Host/CPU I/O cycle 1 I/O Publishing ...
CPPAtomicsandMemoryOrdering
C , Atomics and Memory Ordering Some links are below: * C Reference Site * Nice collection of links and papers Main.JoeBrandt 2015 09 09
CodeEditorRamblings
Code Editors I recently spent some time looking around for an upgrade to my toolbox: code editor. I tried various ones and put together some thoughts on each. I s...
CommentsOnPointingFocusing
GBT Pointing and Focusing Implementation Notes General (Original text by RichardPrestage, Italics text by JoeBrandt) If you agree, I'd like to turn this into a P...
ConceptOfRAOpsDiscussion
Notes on Radio Astron Control/Monitoring Software Cass House Monitor and Control Interface MR The following are thoughts/assertions inspired from Galen's MR: ...
DDL2XMLschemadoc
Data Description XML Schema The new method of specifying data descriptions is via XML files one file per manager. This document outlines the XML format, and tag...
DiscussionOfAzOscIssues
Az Oscillation Issues We had issues with the az axis when in cold wtx/low rate mode. This has been traced down to an error in setting the CCU's AzFilter.Vel (Az m...
EthercatIgnMasterNotes
EtherCAT Igh Master Notes Building: * Directory /home/sandboxes/jbrandt/ethercat devel r1590 * Documentation is available at www.etherlab.org * running ...
FastPlotterNotes
Fastplotter Introduction In the course of putting together a set of real time graphs using python, I found that the resulting application took around 30 40% of t...
FourPointsClusterNetPerf
GPU Cluster Network Performance Introduction Although the hardware which hosts the GPU cards was not specifically chosen for its network/CPU performance, I decid...
GBSoftwareVEGASL1LBW1Testing
L1LBW1 Testing Mode 4 * 32k channels * chan_bw 3433 Hz * center_frequency 750.0MHz * tone ~701 MHz * I would predict the tone to be in 2111, I see...
GBTAntennaTrajectoryAPI
GBT Antenna Trajectory API This document describes (a) the API for issuing trajectories to the antenna manager; and (b) how astrid uses that API for ephemeris and...
GPUClusterDescription
Green Bank GPU Cluster Description This page describes a GPU cluster currently being assembled to test the application of GPU technology for backend data processi...
GPUInformationLinks
GPU Courses, Tutorials and other Information Local Information for using the GPU's on the Four Corners Cluster * To setup for Cuda compilation using the versi...
GbtPlanningGroup
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GrailNotes
Grail Development Notes 12/13/2006 Field Callback improvements Grail has been modified to improve the field level callback services. In addition to providing ca...
HeuristicsResetBug15Nov2015
Report Of GFM Heuristics resetting Ops report: 17:11 Oct 17, 2015 (21:11UTC) Computer Software failure on ASTRID Heuristics Setting. NLT. ASTRID heuristics resets...
IFManagerDebuggingMemoryUseLogs
IFManager Memory Use Logs * Thus far, only one instance of increased memory use has been seen. This occurred during a Zpectrometer run with Andy Harris. The pr...
IndexToSC07Tutorials
Supercomputing 2007 Tutorial Index (Please note this material is not public domain, do not redistribute!) Day 1: * Parallel Computing 101 * Parallel I/O in...
InpirationalQuotes
Wisdom for Life Front Runners: * "Everything is linear up close; nothing is linear from far away." * "The reason we struggle with insecurity is because we ...
JJBSect8Tests
Joe's Outline: CCU Hardware EtherCAT card Condition/Test: The EtherCAT card indicates error or link loss Detected by: CCU Fault analysis Expected Response: PLC ...
JoeBTempNotePad
Az/El System Watchdogs and Failure Scenarios Requirements CCU Task Overrun Checks * The CCU task sequencer shall monitor its controlled tasks for overrun con...
JoesADASS2007Notes
ADASS 2007 Notes Visualization Tutorials 3 D Visualization in Astronomy * View data in three axes: (freq,RA,DEC) * Normally we would like to display 3 ax...
JoesAstroGPUNotes
Astro GPU 2007 Notes The first Astro GPU conference was held in Princeton, NJ at the Institute for Advanced Studies on November 9 10. The agenda is available on l...
JoesCalendar
SDD Calendar Vacation Policy: Take as much as necessary. Table of Contents Personal Leave * 24 May 2019 Day off * 31 May 2019 Day off * 07 June...
JoesGPUforRFIPage
GPU's for RFI Excision Page FRSC Program This program originally was entirely single threaded and CPU based and written in 'C'. It consumes a configuration 'jo...
JoesPyPFMFunctions
PFM Database Utilities The file AntennaRDB.py has a number of methods to create/copy/modify antenna pointing and focus model database entries. This page documents...
JoesRtMain
Annotated rtmain.c * main() * rt_Main() * rt_HostInterface() /* COPYRIGHT (C) 2003 Lorenzo Dozio (dozio #64;aero.polimi.it) Paolo Mantegazza (mante...
LeapSecondUpdatedPage2012
How Are Leap Seconds Handled? This document attempts to outline some of the issues and details of handling leap second events. Background Green Bank time distrib...
LegoProgrammingClass
Lego Programming * Session #1 Introduction to Robolab Inventor * Session #2 Bumpbots * Session #3 Sensors How computers see the world * Session #4 M...
MachineNamesProposal
Proposal for GBT Host Names The Stakeholders As new machines are introduced into the system, we should be mindful that these will be used by Operations, Software...
MarkWhitehead
NRAO * Functional Areas * OSO Main * NSF CI * staff * Library GB Operations * GB SDD Main * Commissioning Meeting Minutes * GBT Schedule ...
MatlabKernelTunableParamsInterface
Matlab Kernel Tunable Parameters This document is a walk through on accessing Matlab generated code from C , without hard coding structure header definitions. Ma...
MiscNotesOnEIMtg
Main.JoeBrandt 2011 01 19
NRAOStaffGroup
Edit this topic to add a description to the NRAOStaffGroup
NewACUConfiguration
New ACU Configuration Network Interfaces The ACU requires two (minimum) interfaces: * one for site network * (10MBit) interface for the CCU and SCU. Curre...
NewCCUTestBedNotes
Notes on CCU/SCU Testbed Note: This pseudo random stream of thought is for entertainment only! Introduction The servo project will be developing a number of ev...
NotSoStupidC_Tricks
Not So Stupid C/C99 Tricks URL's are Valid Syntax URLs are valid C syntax: http://www.example.com \___/\_______________/ Label Comment Simulating C 11's stat...
NumericPrecisionNotes
Floating Point and Numeric Precision Notes * What Every Programmer Should Know * Software, presentations * Description of long double (quad precision) ...
OpenHouse2Compdiv
Open House #2 SDD Theme: RFI/Quiet Zone Stellarium Demo Telescope control, tracking, computing power and telescope mounts 3D Slicer Demo Data Visualization ...
ProtoMRforInstrumentingSC
Instrumenting the Scan Coordinator for Latency Reduction Introduction The idea here would be to instrument the scan coordinator with logging facilities so that w...
ProtoMRforLimitingSSegFbk
Proto MR for Limiting Scan Segment Parameter Feedback Modification Request #n (Q99 2099) 1. Introduction The GBT control system is based upon controllers or ma...
ResettingTermSvrTtys
How To Reset Terminal Server TTY ports Reset/Initialize the specified tty device to its default state. syntax: kill tty= (tty_number range) # kill tty=8 Task(s)...
RevisedOOFReportSandbox
Main.JoeBrandt 2014 11 14
RockConcertMovement237
Rock concert movement #237: Taking the audience on a jungian journey into the collective unconscious by using the shadow as a metaphor for the primal self that ge...
SC12InterestingPapers
Proceedings * http://www.gb.nrao.edu/internal/sc12/SC12Proceedings/SC12.html Interesting Papers (Joe) Efficient Data Restructuring and Aggregation for I/O Acce...
SC12OpenMPNotes
OpenMP This was an intermediate tutorial which I joined in the latter half. There are alot of resources available for openMP, including the two tutorials at SC201...
SC12PerformanceAnalysisTools
Performance Analysis * Why is my code slow? * Where are the 'hot spots'? Tools * linux 'time' command program run time * gprof (automatic instrumen...
SC12SummaryNotes
Supercomputing 2012 Summary: Papers can be found at: http://www.gb.nrao.edu/internal/sc12/SC12Proceedings/SC12/html/Papers.html Tutorials are at: http://www.gb.nr...
SRPSATDryrun
GBT Azimuth / Elevation Servo System Site Acceptance Test Procedures Project: PTCS Servo Dry Run Tests This is not the Test procedure Comments and Questions...
SandboxMapTest
Delivery 1 Our definition of 'Delivery 1' means the new linux CCU with a position only control loop integrated with the new rate loop card. In the paragraphs belo...
SixtyFourBitNotes
Porting to 64 bit: Aches and Pains Basic Differences Type 32 bit size (ILP32) 64 bit size (LP64) any pointer type 4 8 long long 8 ...
SubrflectorRateProblemDescription
Introduction The initial symptom was noted that the subreflector would not accurately track a trajectory during focus scans. When performance was checked (by exam...
TrajectoryBumpImages
Trajectory Preprocessor Debugging Main.JoeBrandt 07 Jan 2008
UsefulAndSometimesObscure
The lsof Command Useful for a number of things like: * Mapping port numbers to processes: * As root: lsof i grep portnum * As any: netstat ap ...
WebStatistics
Statistics for Main Web Month: Topic views: Topic saves: File uploads: Most popular topic views: Top contributors for topic save and uploads: ...
YgorvsIgorHistory
Ygor, Igor Selection of a System Name In show business and software development, the name chosen is almost is important as the person or product. The GBT (Green...
Number of topics: 65
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