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development:gnss_calibration
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development:gnss_calibration [2020/11/19 03:37] Tiege McCarthy |
development:gnss_calibration [2021/01/20 22:39] 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:**: | ||
| + | * **Draft observing guide:** I have written a rough guide outlining the steps required in order to undertake the GNSS tracks and recording which currently exists [[https://docs.google.com/document/d/1ZQYY4cJqCG02h52L18jyCAuboBhCwgeG2JhKxVYTsHk/edit?usp=sharing|on my google drive]] (Tiege) | ||
| + | |||
| + | **Jan 21, 2021:**: | ||
| + | * **GPS050 tracks:** Finally have a run not being cancelled by weather. Running a full track of GPS050 today (and hopefully tomorrow pending weather) - trying a 2 degree offset on offsource scans as 1 degree was too little in our last run with valid data. Also trying some new spectrum analyzer settings - keeping RBW at 3 MHz and VBW at 10 MHz, but changing span to 999 MHz and sweep points to 333, this should remove the need to resample the data when reducing the data - should know by tomorrow. Ideally we will get another couple of tracks on this source next week to check experiment to experiment repeatability of the results. | ||
| + | * **Flux calibration** Assuming wind remains pleasant, will get some data on a couple of bright quasar sources - 1934-638 is a little too weak for our setup. Would also be good to get multiple sources so we can check SEFD estimations. (Tiege) | ||
| **TO DO**: | **TO DO**: | ||
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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) | ||
/home/www/auscope/opswiki/data/pages/development/gnss_calibration.txt · Last modified: 2021/01/25 00:42 by Tiege McCarthy
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