This is a location for information regarding the receiver modifications planned for Fall 2007. The original receiver page is still attached below.

Project Close Out Punch List:

Fool/Idiot/Bullet-proof the data analysis code for GBT Spectrometer data

• Wagg, 10-20 hours

Write up instructions for the analysis code

• Wagg, 10-20 hours

Final version of GBT Spectrometry Memo

• Complete

CCB Commissioning Memo

• Mason, 10 hours

Update Tcal and Tsys values (continuum) in the calibration database with recent measurements.

• Waiting on data reduction to produce Tcal and Tsys values.

List of 'To Do' items left unfinished... MR's, hardware, etc.

• MR's:
  • Proper Setting of LO1 B Frequency To Avoid Interference, 10C107
  • Ka Manager Changes, 1C507
  • config_tool Changes Related to Ka Manager Changes, 7C507
  • IF Manager Changes Related to Ka Manager Changes, 8C507
  • config_tool Changes Regarding LO1B/mm-wave Converters, 10C507
  • Fix GFM's Processing of Ka Data, 9C507
  • Update AIPS++ Filler to Handle Ka Changes, 1C607
• Hardware:
  • Conversion Mixers Noise Figure >36 GHz
  • Possible Zpec Path Compression
  • Tone Cal level amp

Important Dates

• September 19: Ka Receiver installed on the telescope.
• September 27: Zpectrometer installed on telescope.
• September 24-October 12: Ka Receiver/Spectrometer Commissioning
• October 1-13: Zpectrometer Commissioning
• October 17, 3:00 PM GB137 : Ka-band single-pol configuration decision meeting: Continue or Revert?
  Minutes: KaMtgOct172007 Decision: No changes for 07C, 08A.

This page is being moved to https://wikio.nrao.edu/bin/view/GBT/KaBandReceiver

• November 19-23: Thanksgiving

• November 30: Project Close Out Meeting

Recent meeting minutes

2007 Modification Meeting Minutes

Software Modification Requests

• Pisano, Maddelena, 5 hours

• Complete

• Waiting on data reduction to produce Tcal and Tsys values.

• • update Tcal and Tsys values (spectral and continuum) in the calibration database with recent measurements

Update Tcal and Tsys values (continuum) in the calibration database with recent measurements.

• • Tone Cal level amp

• • update Tcal and Tsys values (spectral and continuum) in the calibration database with recent measurements

• • Conversion Mixers Noise Figure <36 GHz

• • Conversion Mixers Noise Figure >36 GHz

Project Close Out Punch List

• Bullet proof the data analysis code for GBT Spectrometer data

Project Close Out Punch List:

Fool/Idiot/Bullet-proof the data analysis code for GBT Spectrometer data

• Write up instructions for the analysis code

Write up instructions for the analysis code

• Final version of GBT Spectrometry Memo

Final version of GBT Spectrometry Memo

• CCB Commissioning Memo

CCB Commissioning Memo

• List of 'To Do' items left unfinished... MR's, hardware, etc.
  • Collaborative effort.

List of 'To Do' items left unfinished... MR's, hardware, etc.

• MR's:
  • Proper Setting of LO1 B Frequency To Avoid Interference, 10C107
  • Ka Manager Changes, 1C507
  • config_tool Changes Related to Ka Manager Changes, 7C507
  • IF Manager Changes Related to Ka Manager Changes, 8C507
  • config_tool Changes Regarding LO1B/mm-wave Converters, 10C507
  • Fix GFM's Processing of Ka Data, 9C507
  • Update AIPS++ Filler to Handle Ka Changes, 1C607
• Hardware:
  • Conversion Mixers Noise Figure <36 GHz
  • Possible Zpec Path Compression

• List of 'To Do' items left unfinished... MR's, hardware, etc.
  • Collaborative effort.

• Final version of GBT Spectrometry Memo
  • Pisano, Maddelena, 5 hours
• CCB Commissioning Memo
  • Mason, 10 hours

Project Close Out Punch List

• Bullet proof the data analysis code for GBT Spectrometer data
  • Wagg, 10-20 hours
• Write up instructions for the analysis code
  • Wagg, 10-20 hours

• November 30: Project Close Out Meeting, Agenda at KaMtgNov302007

• November 30: Project Close Out Meeting

• No further meetings planned at this time.

• KaMtgNov302007 : November 30 Project Close Out Meeting, Unsuccessful

Problems

• 19 Sep 2007 - Ka receiver failed to talk to MCB until MCB was reset.

Information pertaining to the modifications done during the Summer of 2007 is located at KaMods2007.

• September 2007: The receiver is installed on the GBT. Modifications have been made, see KaMods2007, that changed the receiver to two beams, one linear polarization per beam.

• September 2007: The receiver is installed on the GBT. Modifications have been made that changed the receiver to two beams, one linear polarization per beam. See KaMods2007.

Status Reports

• Latest Status Report

Status

• September 2007: The receiver is installed on the GBT. Modifications have been made, see KaMods2007, that changed the receiver to two beams, one linear polarization per beam.

• November 30: Project Close Out Meeting, Agenda at KaMtgNov302007

• KaMtgOct172007 To decide near future Ka configuration.

• KaMtgOct172007 : To decide near future Ka configuration.

• KaFeedPatters.pdf: Feed patterns at 26, 32 and 40 GHz

• KaFeedPatters.pdf: Feed patterns at 26, 32 and 40 GHz

%META:FILEATTACHMENT{name="KaFeedPatters.pdf" attr="" comment="Feed patterns at 26, 32 and 40 GHz" date="1195235468" path="KaFeedPatters.pdf" size="296959" user="GalenWatts" version="1.1"}%

• October 17, 3:00 PM GB137 : Ka-band single-pol configuration decision meeting: Continue or Revert?
  Minutes: KaMtgOct172007 Decision: No changes for 7C, 8A.

• October 17, 3:00 PM GB137 : Ka-band single-pol configuration decision meeting: Continue or Revert?
  Minutes: KaMtgOct172007 Decision: No changes for 07C, 08A.

• September 19: Ka Receiver installed on the telescope!
• September 27: Zpectrometer installed on telescope!

• September 19: Ka Receiver installed on the telescope.
• September 27: Zpectrometer installed on telescope.

October 17, 3:00 PM GB137 : Ka-band single-pol configuration decision meeting: Continue or Revert?
Agenda: KaMtgOct172007

• 1vs2Deltas.pdf: Ratios in dB of OMT path measurements made with the lab VNA. 1 and 2 are Side/Thru of the corresponding OMT, 3-6 are ratios of paths of each OMT in combinations that could be implemented in the receiver in the dual beam/dual circular configuration. Plot 6 looks promising for Zpectrometry.

• October 17, 3:00 PM GB137 : Ka-band single-pol configuration decision meeting: Continue or Revert?
  Minutes: KaMtgOct172007 Decision: No changes for 7C, 8A.

• KaMtgOct172007 To decide near future Ka configuration.

• 1vs2Deltas.pdf: Ratios in dB of OMT path measurements made with the lab VNA. 1 and 2 are Side/Thru of the corresponding OMT, 3-6 are ratios of paths of each OMT in combinations that could be implemented in the receiver in the dual beam/dual circular configuration. Plot 6 looks promising for Zpectrometry.

• 1vs2Deltas.pdf: Ratios in dB of OMT path measurements made with the lab VNA. 1 and 2 are Side/Thru of the corresponding OMT, 3-6 are ratios of paths of each OMT in combinations that could be implemented in the receiver in the dual beam/dual circular configuration. Plot 6 looks promising for Zpectrometry.

%META:FILEATTACHMENT{name="1vs2Deltas.pdf" attr="" comment="Ratios of OMT measurements" date="1192621693" path="1vs2Deltas.pdf" size="564727" user="GalenWatts" version="1.1"}%

October 17, 3:00 PM GB137 : Ka-band single-pol configuration decision meeting: Continue or Revert?

October 17, 3:00 PM GB137 : Ka-band single-pol configuration decision meeting: Continue or Revert?
Agenda: KaMtgOct172007

September 19: Ka Receiver installed on the telescope!

September 27: Zpectrometer installed on telescope!

• September 19: Ka Receiver installed on the telescope!
• September 27: Zpectrometer installed on telescope!

October 17 : Ka-band single-pol configuration decision meeting: Continue or Revert?

October 17, 3:00 PM GB137 : Ka-band single-pol configuration decision meeting: Continue or Revert?

• October 18 : Ka-band single-pol configuration decision: Continue or Revert?

October 17 : Ka-band single-pol configuration decision meeting: Continue or Revert?

September 19: Ka Receiver Installed on the telescope!

• September 27: Zpectrometer installed on telescope

September 19: Ka Receiver installed on the telescope!

September 27: Zpectrometer installed on telescope!

Important Dates

September 19: Ka Receiver Installed on the telescope!

• September 27: Zpectrometer installed on telescope
• September 24-October 12: Ka Receiver/Spectrometer Commissioning
• October 1-13: Zpectrometer Commissioning
• October 18 : Ka-band single-pol configuration decision: Continue or Revert?
• November 19-23: Thanksgiving

Upcoming meeting agendas

• KaMtgSept282007

• KaMtgSept282007 : Canceled
• No further meetings planned at this time.

Important Dates

September 19: Ka Receiver Installed on the telescope!

• September 27: Zpectrometer installed on telescope
• September 24-October 12: Ka Receiver/Spectrometer Commissioning
• October 1-13: Zpectrometer Commissioning
• October 18 : Ka-band single-pol configuration decision: Continue or Revert?
• November 19-23: Thanksgiving

• KaMods2007 -- Information pertaining to the modifications done during the Summer of 2007.

• September 24 (week of): Zpectrometer installed on telescope

• September 27: Zpectrometer installed on telescope

Software Modification Requests for this project, in order of priority. Completed MR's are listed at the bottom of the table.

Software Modification Requests

MR rankings are:

1. Must be complete for fall observing to commence
2. Highly desired for fall observing
3. Desired for fall observing
4. Desired to complete the project

Vector Tcals are out of scope of this project

Updated at 8:50 AM EDT, September 20 but recent changes since SPoRC6 v1.60 may not be shown here, see Software Plan of Record Cycle 6, 2007

Rank	MR	Description	Responsible	Status	Comments
2	MR17C507	Subreflector Nodding Observing API Building Block	Pisano	Most implementation and unit testing completed, still need to retrofit focus scans. Final simulation testint will start next week.
2	MR2C407	Control of Subreflector Nodding by Astrid	Pisano	Approved	Waiting for completion of SubMotion? building blocks (17C507)
2	MR5C507	Implement GBTIDL Reduction Procedure for Subreflector Nodding	Pisano & Maddelena	submitted for review	Another round of feedback send back to Ron and others. Dependant on 2C407
2	MR4C507	Indicate Subreflector Position in Data	Maddelena/Garwood	Submitted for review	Written except for one possible item that would be useful to test during if possible. The checking step can begin now.
3	MR10C107	Proper Setting of LO1B Frequency To Avoid Interference	Watts	Being written	Initial MR by Minter.
4	MR1C507	Ka Manager Changes	Watts	Being written
4	MR7C507	config_tool Changes Related to Ka Manager Changes	Watts	Being written	Dependant on 1C507
4	MR8C507	IF Manager Changes Related to Ka Manager Changes	Watts	Not started, need 1C507 first.	Dependant on 1C507
4	MR10C507	config_tool Changes Regarding LO1B/mm-wave Converters	Watts	Being written	Hacked together an MR last fall to address that 4 GHz of Ka-band could not be observed with the implemented, wrong algorithm. MR was implemented but LO1B is still being set to a value outside of a filter's range for most of Ka-band. Subsequently, Roger Norrod has been asked (by Maddelena) to write an MR that uses the correct algorithm, using notes he distributed in January. MR should be done by July 20.
4	MR3C407	Correct Labeling of Ka-band Hybrid-switched Signals	Pisano	MR complete.
4	MR9C507?	Fix GFM's Processing of Ka Data	Maddelena	Not started	Very little paper trail on the current implementation -- mostly emails. Supposedly this worked at one time but now doesn't. An annoyance -- requires losing telescope time at Astrid startup. Not started.
4	MR15C507	Merge Zpectrometer code branch into main trunk	ONeil, Baker	Code merge (GBTIDL and sparrow) finished, working on new organization of /home/sdfits.
4	MR1C607?	Update AIPS++ Filler to Handle Ka Changes	ONeil		Nothing done yet
1	MR2C507	Auto-Clearing of Subreflector Commands	Pisano	DONE
1	MR11C507	Ka FITS Message Angle Comment	ONeil	DONE
2	MR6C507	Ka FITS Message Angle Keyword	ONeil	DONE
3	MR3C507	Set GFM's Processing of Ka Data to Raw	Maddelena	DONE
4	Finalize Ka FITS File Specification	Finalize Ka Rx fits specs	O'Neil	DONE

• August 15: Commence Receiver Tcal, Trx, Lab Spectrometer and Software Manager testing
• September 17 (week of): Receiver installed on telescope.

September 19: Ka Receiver Installed on the telescope!

Problems

• 19 Sep 2007 - Ka receiver failed to talk to MCB until MCB was reset.

Updated at 9:50 AM EDT, September 14 but recent changes since SPoRC6? v1.54 may not be shown here, see Software Plan of Record Cycle 6, 2007

Updated at 8:50 AM EDT, September 20 but recent changes since SPoRC6 v1.60 may not be shown here, see Software Plan of Record Cycle 6, 2007

• KaMtgAug312007 : Cancelled

Upcoming meeting agendas

• KaMtgAug312007 : Canceled

Upcoming meeting agendas

Updated at 10:10 AM EDT, September 10 but recent changes may not be shown here, see Software Plan of Record Cycle 6, 2007

Updated at 9:50 AM EDT, September 14 but recent changes since SPoRC6? v1.54 may not be shown here, see Software Plan of Record Cycle 6, 2007

• Lab Spectrometer data from the tests of September 7-11 is in /home/labdata/TKA070907, .../TKA070909, .../TKA070910, .../TKA070910B, .../TKA070911.
• Beam 1, 39/0.8 GHz

• Lab Spectrometer data from the tests of September 7-11 is in /home/labdata/TKA070907, .../TKA070909, .../TKA070910, .../TKA070910B, .../TKA070911. Each directory has a text file, 'Notes,' that explains the details of particular scans.

Lab Spectrometer Waterfall Baseline Plots from September, 2007

• Beam 2, 27.5/0.8 GHz:
  

• Beam 2, 33/0.8 GHz:
  

• Beam 2, 36.5/0.8 GHz:
  

• Beam 1, 39/0.8 GHz
  

%META:FILEATTACHMENT{name="B2G33.png" attr="h" comment="Beam 2, 33/0.8 GHz" date="1189616800" path="B2G33.png" size="111967" user="GalenWatts" version="1.1"}% %META:FILEATTACHMENT{name="B2G275.png" attr="h" comment="Beam 2, 27.5/0.8 GHz" date="1189616832" path="B2G275.png" size="115530" user="GalenWatts" version="1.1"}% %META:FILEATTACHMENT{name="B2G365.png" attr="h" comment="Beam 2, 36.5/0.8 GHz" date="1189616863" path="B2G365.png" size="114241" user="GalenWatts" version="1.1"}%

• Beam 1, 39/0.8 GHz

• B1G39: Beam 1, 39/0.8 GHz

%META:FILEATTACHMENT{name="B1G39" attr="h" comment="Beam 1, 39/0.8 GHz" date="1189611471" path="B1G39" size="69155" user="GalenWatts" version="1.1"}% %META:FILEATTACHMENT{name="B1G39.png" attr="h" comment="Beam 1, 39/0.8 GHz" date="1189612348" path="B1G39.png" size="113268" user="GalenWatts" version="1.2"}%

• Lab Spectrometer data from the tests of September 7-11 is in /home/labdata/TKA070907, .../TKA070909, .../TKA070910, .../TKA070910B, .../TKA070911.

• July 28-Aug 4: K. O'Neil, Marganian out of town
• August 1: B. Garwood in GB
• August 3: Need Zpectrometer astronomy decision for Oct 1-Jan30 period.
• August 6, AM: CCB Testing.
• August 6-10: Andy Harris et al in GB, Ka-Z Testing.
• August 9-14: Galen out of town.
• August 15: Track shutdown complete.
• August 15: B. Garwood in GB

Software Modification Requests for this project, in order of priority

Software Modification Requests for this project, in order of priority. Completed MR's are listed at the bottom of the table.

Updated at 8:15 AM EDT, August 31 but recent changes may not be shown here, see Software Plan of Record C6, 2007

Updated at 10:10 AM EDT, September 10 but recent changes may not be shown here, see Software Plan of Record Cycle 6, 2007

Upcoming meeting agendas

Upcoming meeting agendas

Pictures

• Front.jpg: Inside view of dewar, modified version.
• Side.jpg: Side view of dewar internal components.
• 50Kabsorber.jpg: 50K radiation shield with absorber.

Updated at 11:50 AM EDT, August 17 but recent changes may not be shown here, see Software Plan of Record C6, 2007

Updated at 8:15 AM EDT, August 31 but recent changes may not be shown here, see Software Plan of Record C6, 2007

%META:FILEATTACHMENT{name="Front.jpg" attr="" comment="Inside view of dewar, modified version." date="1188561910" path="Front.jpg" size="592313" user="GalenWatts" version="1.1"}% %META:FILEATTACHMENT{name="Side.jpg" attr="" comment="Side view of dewar internal components." date="1188562143" path="Side.jpg" size="201037" user="GalenWatts" version="1.1"}% %META:FILEATTACHMENT{name="50Kabsorber.jpg" attr="" comment="50K radiation shield with absorber." date="1188562204" path="50Kabsorber.jpg" size="214220" user="GalenWatts" version="1.1"}%

• KaMtgAug312007

• KaMtgAug312007 : Cancelled

Upcoming meeting agendas

Upcoming meeting agendas

Updated at 11:50 AM EDT, August 16 but recent changes may not be shown here, see Software Plan of Record C6, 2007

Updated at 11:50 AM EDT, August 17 but recent changes may not be shown here, see Software Plan of Record C6, 2007

Updated at 11:50 AM EDT, August 16 but recent changes may not be shown here, see Software Plan of Record C5, 2007

Updated at 11:50 AM EDT, August 16 but recent changes may not be shown here, see Software Plan of Record C6, 2007

• August 15, Brief summary of results from modified Ka-band receiver tests

• KaMtgSept142007
• KaMtgSept282007

Updated at 9:30 AM EDT, August 2nd but recent changes may not be shown here, see Software Plan of Record C5, 2007

Updated at 11:50 AM EDT, August 16 but recent changes may not be shown here, see Software Plan of Record C5, 2007

Upcoming meeting agendas

Upcoming meeting agendas

(Partly from the Trimester 07C Planning page.)

• August 20: Commence Receiver Tcal, Trx, Lab Spectrometer and Software Manager testing

• August 15: Commence Receiver Tcal, Trx, Lab Spectrometer and Software Manager testing

• KaMtgAug312007

• August 14-17: Ka-CCB Testing.

• September 17 (week of): Receiver installed on telescope (Desired)

• September 17 (week of): Receiver installed on telescope.

• September 24-October 6: Ka Receiver Commissioning

• September 24-October 12: Ka Receiver/Spectrometer Commissioning

• October 18 : Ka-band single-pol configuration decision: Continue or Revert?

Recent changes may not be shown here, see Software Plan of Record C5, 2007

Updated at 9:30 AM EDT, August 2nd but recent changes may not be shown here, see Software Plan of Record C5, 2007