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development:gnss_calibration [2020/11/18 06:31] Tiege McCarthy |
development:gnss_calibration [2020/12/15 03:45] Tiege McCarthy |
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* **Recording from spectrum analyser:** I have written a very ugly script that currently grabs trace outputs from the spectrum analyser every 5 seconds during valid time periods (currently from 90s past the start of the scan to the end time). Between the 5 minute blocks it averages all grabbed spectra together and writes them to a file with the timestamp of the scan. | * **Recording from spectrum analyser:** I have written a very ugly script that currently grabs trace outputs from the spectrum analyser every 5 seconds during valid time periods (currently from 90s past the start of the scan to the end time). Between the 5 minute blocks it averages all grabbed spectra together and writes them to a file with the timestamp of the scan. | ||
+ | **Nov 19, 2020:**: | ||
+ | * **Late start tracks:** The bash script generated during schedule generation has now been updated to include 'if' statements with time conditions - this should fix any issues with starting tracks late. Current version of the scripts can be found on my github in a repository named 'antenna_thrust_scripts' (https://github.com/tiegemccarthy/antenna_thrust_scripts) (Tiege) | ||
+ | |||
+ | **Dec 2, 2020:**: | ||
+ | * **Schedules** Two tracks prepared for this day - one for KOSMOS 2461 (R735) and one for GPS IIRM-8 (G050) (Tiege) | ||
+ | * This day was cancelled due to high winds - had a meeting with Lucia, Jamie and Guifre instead. Tracking postponed until next week. (Tiege) | ||
+ | |||
+ | **Dec 8, 2020:**: | ||
+ | * Another cancellation, this time due to post-LBA maintenance on the cryo system. (Tiege) | ||
+ | |||
+ | **Dec 11, 2020:**: | ||
+ | * Remote track on GPS IIRM-8 - fixed a few issues with the observing setup. First issue was time stamps in the shell wrapper not working on newsmerd - the date command was for some reason reading them as GMT+7 timezone despite the default output of date being in UTC. This has since been fixed. (Tiege) | ||
+ | * Also fixed a bug in the recording script that occasionally caused a type error when writing out the data with numpy.savetxt(). (Tiege) | ||
+ | * Wrote a script for doing manual (not scheduled) recording using the spectrum analyser - will be useful for when we need to calibration scans on quasars. (Tiege) | ||
+ | |||
+ | **Dec 15, 2020:**: | ||
+ | * I have written a rough guide outlining the steps required in order to undertake the GNSS tracks and recording which currently exists on my google drive ([[https://docs.google.com/document/d/1ZQYY4cJqCG02h52L18jyCAuboBhCwgeG2JhKxVYTsHk/edit?usp=sharing|here]]) | ||
**TO DO**: | **TO DO**: | ||
- | * **prepare tracks** for 5 min on source off source (for 1 satellite at a time); probably try 1 sec updates; how does sattrack handle this? code up 5 minute tracks to load after each other (run in sequence) - after the track finished, the antenna sits at the final az/el | + | * <del>**prepare tracks** for 5 min on source off source (for 1 satellite at a time); probably try 1 sec updates; how does sattrack handle this? code up 5 minute tracks to load after each other (run in sequence) - after the track finished, the antenna sits at the final az/el</del> |
* **define spectral analyser output** - pulling & scripting seems to work - but what and how long to write out data?; question what resolution and freq span? Why is TRACE output always 500 points? https://cdn.rohde-schwarz.com/pws/dl_downloads/dl_common_library/dl_manuals/gb_1/f/sfl_1/FSL_OperatingManual_en_12.pdf | * **define spectral analyser output** - pulling & scripting seems to work - but what and how long to write out data?; question what resolution and freq span? Why is TRACE output always 500 points? https://cdn.rohde-schwarz.com/pws/dl_downloads/dl_common_library/dl_manuals/gb_1/f/sfl_1/FSL_OperatingManual_en_12.pdf | ||
* **SEFD calibration** - need to work out how to do this? VirgoA or Hydra is strong - use on/offs and spec an. Nominal SEFD about 400-500 Jy | * **SEFD calibration** - need to work out how to do this? VirgoA or Hydra is strong - use on/offs and spec an. Nominal SEFD about 400-500 Jy | ||
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* **get value table ready** - try to replicate the tracking table Peter Steigenberger sent through; figure out boresight angle etc (Lucia to ask Ron/Peter) | * **get value table ready** - try to replicate the tracking table Peter Steigenberger sent through; figure out boresight angle etc (Lucia to ask Ron/Peter) | ||
* **have a look at subsequent estimation** - get all the necessary values together, code an estimator? first understand the code | * **have a look at subsequent estimation** - get all the necessary values together, code an estimator? first understand the code | ||
- | * **next track**: booked in next Wednesday (Nov 18) for more tests | + | * <del>**next track**: booked in next Wednesday (Nov 18) for more tests</del> |
* **next catchup**: booked in Wednesday (Dec 4) | * **next catchup**: booked in Wednesday (Dec 4) | ||