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projects:mkat_sband:pub:start [2021/12/01 10:37]
wucknitz 		projects:mkat_sband:pub:start [2023/01/19 15:49] (current)
wucknitz
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 ^  S4    |  3062.50  |  2625.00 - 3500.00  | ^  S4    |  3062.50  |  2625.00 - 3500.00  |
  
-**Please note that these are the total band ranges. The filters are pretty narrow so that significantly less is usable.**+**Please note that these are the total band ranges, the usable range is smaller. See [[projects:mkat_sband:pub:decfilters#final_design_ver2|description of the decimation filters]] for details.**
  
  
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 ==== Collected SEFD and bandpass information ==== ==== Collected SEFD and bandpass information ====
  
-For a quick overview of the performance of all antennas, we provide curves for all antennas from all relevant observations over all available subbands (sorted by observation id): 
  
-{{:projects:mkat_sband:pub:sefd_allants.pdf|PDF with SEFD curves}} \\ +=== Results for typical antennas ===
-{{:projects:mkat_sband:pub:bandpass_allants.pdf|PDF with bandpass curves (linear)}}\\ +
-{{:projects:mkat_sband:pub:bandpass_corr_allants.pdf|PDF with bandpass curves (linear), amplitude corrected for digital decimation filter for a better comparison}} \\ +
-{{:projects:mkat_sband:pub:sefd_bandpass_allants.pdf|PDF with SEFD and bandpass curves (dB)}}\\ +
-{{:projects:mkat_sband:pub:sefd_bandpass_corr_allants.pdf|PDF with SEFD and bandpass curves (dB), amplitude corrected for digital decimation filter for a better comparison}}+
  
-In addition we have plots that only include post-repair data for the receivers that have been fixed at some point. They are sorted by subband:+The performance of the entire array can be estimated best by taking the median (or some other percentile) over all antennas. Here are corresponding results from the 2022-11-19 observations (see below). First we take the median over all antennas and plot both polarisations individually:
  
-{{:projects:mkat_sband:pub:sefd_goodants.pdf|PDF with SEFD curves}} \\ +{{:projects:mkat_sband:pub:sefd_allants_pols.pdf|Both polarisations}}
-{{:projects:mkat_sband:pub:bandpass_goodants.pdf|PDF with bandpass curves}}\\ +
-{{:projects:mkat_sband:pub:bandpass_corr_goodants.pdf|PDF with bandpass curves, amplitude corrected for digital decimation filter for a better comparison}}\\ +
-{{:projects:mkat_sband:pub:sefd_bandpass_goodants.pdf|PDF with SEFD and bandpass curves (dB)}}\\ +
-{{:projects:mkat_sband:pub:sefd_bandpass_corr_goodants.pdf|PDF with SEFD and bandpass curves (dB), amplitude corrected for digital decimation filter for a better comparison}}+
  
-The following plots are meant to represent the latest status of measurements. Only the latest observations are included (currently only the S2 and S4 of 11th Oct 2021, and S2 19th Oct and S2 and S4 of 2nd Nov and S2 and S4 on 8th Nov):+Second we average the polarisations but show the 10/50/90% percentile over all antennas. This means we see the typical range of antennas: 
 + 
 +{{:projects:mkat_sband:pub:sefd_allants_perc.pdf|10/50/90% percentiles, polarisations averaged}} 
 + 
 +In both files the first five panels show the individual subbands S0/1/2/3/4, the last one combines them all. The yellow vertical lines are the transition frequencies from one subband to the next. In reality the subbands are overlapping, but I always used the inner part where possible. 
 + 
 + 
 +== Files with the numbers == 
 + 
 +[[https://cloud.mpifr-bonn.mpg.de/index.php/s/NCkN2o9a2wGAQGH|Here the same data are provided as text files with space-separated numbers.]] The first line in each file describes the fields (the same for all). 
 + 
 + 
 + 
 +=== Results for individual antennas === 
 + 
 +For a quick overview of the performance of all antennas, we provide curves for all antennas from relevant observations over all available subbands. 
 + 
 +**The first set of plots is meant to represent the latest measurements. These are currently the final SEFD measurements of 2022-11-19 at high elevations:**
  
 {{:projects:mkat_sband:pub:sefd_latest.pdf|PDF with SEFD curves}} \\ {{:projects:mkat_sband:pub:sefd_latest.pdf|PDF with SEFD curves}} \\
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 {{:projects:mkat_sband:pub:sefd_bandpass_latest.pdf|PDF with SEFD and bandpass curves (dB)}}\\ {{:projects:mkat_sband:pub:sefd_bandpass_latest.pdf|PDF with SEFD and bandpass curves (dB)}}\\
 {{:projects:mkat_sband:pub:sefd_bandpass_corr_latest.pdf|PDF with SEFD and bandpass curves (dB), amplitude corrected for digital decimation filter for a better comparison}} {{:projects:mkat_sband:pub:sefd_bandpass_corr_latest.pdf|PDF with SEFD and bandpass curves (dB), amplitude corrected for digital decimation filter for a better comparison}}
 +
 +Note that the scales for some antennas are treated specially here for the moment, because the SEFD and bandpass phases are not in normal ranges.
 +
  
 The filter-corrected bandpass curves can be used to see how consistent the bandpass is between observations in different subband modes. This is possible because of a large overlap between the bands. The filter-corrected bandpass curves can be used to see how consistent the bandpass is between observations in different subband modes. This is possible because of a large overlap between the bands.
  
 In order to study the differences between the two polarisations, we also provide plots of the logarithm of the radio pol0/pol1 for bandpass (signal, green), noise (SEFD, yellow) and signal-to-noise (red): In order to study the differences between the two polarisations, we also provide plots of the logarithm of the radio pol0/pol1 for bandpass (signal, green), noise (SEFD, yellow) and signal-to-noise (red):
- 
-{{:projects:mkat_sband:pub:polratio_allants.pdf|Ratio pol0/pol1 of signal, noise and signal/noise (all obs)}}\\ 
-{{:projects:mkat_sband:pub:polratio_goodants.pdf|Ratio pol0/pol1 of signal, noise and signal/noise (only good obs)}} 
- 
-And here the same for only the latest measurements: 
  
 {{:projects:mkat_sband:pub:polratio_latest.pdf|Ratio pol0/pol1 of signal, noise and signal/noise}} {{:projects:mkat_sband:pub:polratio_latest.pdf|Ratio pol0/pol1 of signal, noise and signal/noise}}
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-**Note that the scales for some antennas are treated specially here for the moment, because the SEFD and bandpass phases are not in normal ranges. This is probably because those receivers were not ready for observations.**+**The following plots include all observations, which makes very large and difficult to view. These are mainly good for historical purposes:** 
 + 
 +{{:projects:mkat_sband:pub:sefd_allants.pdf|PDF with SEFD curves}} \\ 
 +{{:projects:mkat_sband:pub:bandpass_allants.pdf|PDF with bandpass curves (linear)}}\\ 
 +{{:projects:mkat_sband:pub:bandpass_corr_allants.pdf|PDF with bandpass curves (linear), amplitude corrected for digital decimation filter for a better comparison}} \\ 
 +{{:projects:mkat_sband:pub:sefd_bandpass_allants.pdf|PDF with SEFD and bandpass curves (dB)}}\\ 
 +{{:projects:mkat_sband:pub:sefd_bandpass_corr_allants.pdf|PDF with SEFD and bandpass curves (dB), amplitude corrected for digital decimation filter for a better comparison}} 
 + 
 +Here are the corresponding plots of the logarithm of the radio pol0/pol1 for bandpass (signal, green), noise (SEFD, yellow) and signal-to-noise (red): 
 + 
 +{{:projects:mkat_sband:pub:polratio_allants.pdf|Ratio pol0/pol1 of signal, noise and signal/noise (all obs)}} 
 + 
 + 
 + 
 + 
 +**[[projects:mkat_sband:pub:decfilters#test_observations|A comparison of old and new decimation filters can be found here.]]** 
  
  
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 [[https://docs.google.com/spreadsheets/d/1vkU8JbORwRnFbOLsAbmyU3Sf4chTLwfOdXe26Yq93r4/edit?usp=sharing|Pieter Kotze's receiver status table]] [[https://docs.google.com/spreadsheets/d/1vkU8JbORwRnFbOLsAbmyU3Sf4chTLwfOdXe26Yq93r4/edit?usp=sharing|Pieter Kotze's receiver status table]]
  
-These are just rought numbers taken from the plots (only at the best frequencies):+These are just rought numbers taken from the plots of the final measurements (only at the best frequencies). The replacement status is not necessarily up to date:
  
 ^ ant  ^  best SEFD pol 0/1 [Jy]  ^ batch      ^ notes   ^ ^ ant  ^  best SEFD pol 0/1 [Jy]  ^ batch      ^ notes   ^
-^ m000 |  400/420                 |   1        |         |+^ m000 |  390/410                 |   1        |         |
 ^ m001 |  390/400                 |   2        |         | ^ m001 |  390/400                 |   2        |         |
-^ m002 |  390/440                 |   1        |         | +^ m002 |  390                     |   1        |         | 
-^ m003 |  410                     |   1        |         | +^ m003 |  390                     |   1        | from previous obs, not included in last      | 
-^ m004 |  400                     |   1        |         | +^ m004 |  400                     |   1        | from previous obs, not included in last      | 
-^ m005 |  400/**490**             |   1        |         | +^ m005 |  400/420                 |   1        |         | 
-^ m006 |  390/**440**             |   1        |         | +^ m006 |  390/440                 |   1        |         | 
-^ m007 |  420                     |  pre-prod  |         | +^ m007 |  410                     |  (was pre-prod)  |         | 
-^ m008 |  (450)                   |  replaced  | not included in last observation   | +^ m008 |  400                     |  (replaced)  |    | 
-^ m009 |  410                     |   3        |         |+^ m009 |  400                     |   3        |         |
 ^ m010 |  400/410                 |   3        |         | ^ m010 |  400/410                 |   3        |         |
 ^ m011 |  380/400                 |   1        |         | ^ m011 |  380/400                 |   1        |         |
-^ m012 |  400/**470**             |   2        |         |+^ m012 |  400/470                 |   2        |         |
 ^ m013 |  400                     |   2        |         | ^ m013 |  400                     |   2        |         |
-^ m014 |  400                     |   3        |         | +^ m014 |  410/400                 |   3        |         | 
-^ m015 |  430/**450**             |   3        | **second pol huge variations with freq**  | +^ m015 |  420/**450**             |   3        | **second pol huge variations with freq**  | 
-^ m016 |  400                     |   2        |         | +^ m016 |  410                     |   2        |         | 
-^ m017 |  430/450                 |   3        |         |+^ m017 |  430/410                 |   3        |         |
 ^ m018 |  420                     |   2        |         | ^ m018 |  420                     |   2        |         |
-^ m019 |  390/**450**             |   3        |         | +^ m019 |  400/470                 |   3        |         | 
-^ m020 |  390/**450**             |   3        |         |+^ m020 |  390/440                 |   3        |         |
 ^ m021 |  400                     |   1        |         | ^ m021 |  400                     |   1        |         |
-^ m022 |  400/**490**             |   2        |         | +^ m022 |  400/470                 |   2        |         | 
-^ m023 |  380/**420**             |   2        |         | +^ m023 |  380/410                 |   2        |         | 
-^ m024 |  400/410                 |   4        |         | +^ m024 |  410/400                 |   4        |         | 
-^ m025 |  380/**410**             |   3        |         | +^ m025 |  400/420                 |   3        |         | 
-^ m026 |  390/400                 |   3        |         | +^ m026 |  470                     |   3        |         | 
-^ m027 |  400/390                 |   2        |         | +^ m027 |  400                     |   2        |         | 
-^ m028 |  370/**420**             |   4        |         | +^ m028 |  380/420                 |   4        |         | 
-^ m029 |  420/440                 |   4        |         | +^ m029 |  430/440                 |   4        |         | 
-^ m030 |  400/420                 |   1        |         | +^ m030 |  400                     |   1        |         | 
-^ m031 |  **>3000**               |   3        | **was 430 earlier**  | +^ m031 |  400                     |   3        |    | 
-^ m032 |  **420**/390             |   3        |         | +^ m032 |  420/400                 |   3        |         | 
-^ m033 |  390/400                 |   3        |         | +^ m033 |  390                     |   3        |         | 
-^ m034 |  **450/530**             |   3        |         |+^ m034 |  400/440                 |   3        |         |
 ^ m035 |  400                     |   3        |         | ^ m035 |  400                     |   3        |         |
-^ m036 |  390/380                 |   3        |         | +^ m036 |  400/**700**             |   3        | **second pol very bad**     | 
-^ m037 |  390/400                 |   4        |         | +^ m037 |  400                     |   4        |         | 
-^ m038 |  (400/420)               |   2        | not included in last observation  | +^ m038 |  400/420                 |   2        |  | 
-^ m039 |                          |   4        |         | +^ m039 |  390                     |   4        |         | 
-^ m040 |  380/**430**             |   4        |         | +^ m040 |  390/420                 |   4        |         | 
-^ m041 |  390/**440**             |   4        |         | +^ m041 |  390/430                 |   4        |         | 
-^ m042 |  420/430                 |   4        |         | +^ m042 |  410/430                 |   4        |         | 
-^ m043 |  400                     |   1        |         | +^ m043 |  400                     |   1        | from previous obs, not included in last       | 
-^ m044 |  450                     |   4        |         | +^ m044 |  430                     |   4        |         | 
-^ m045 |  400/410                 |   1        |         | +^ m045 |  400                     |   1        |         | 
-^ m046 |  440/460                 |   4        |         | +^ m046 |  450                     |   4        |         | 
-^ m047 |  410/420                 |   4        |         | +^ m047 |  400                     |   4        |         | 
-^ m048 |  400/380                 |   2        |         | +^ m048 |  420/390                 |   2        |         | 
-^ m049 |  430/420                 |   1        |         | +^ m049 |  430/410                 |   1        |         | 
-^ m050 |  370/390                 |   2        |         | +^ m050 |  370/380                 |   2        |         | 
-^ m051 |  400/**440**             |   4        |         | +^ m051 |  400/450                 |   4        |         | 
-^ m052 |                          |   4        |         | +^ m052 |  390/420                 |   4        |         | 
-^ m053 |  400                     |   1        |         | +^ m053 |  410/400                 |   1        |         | 
-^ m054 |  380                     |   2        |         | +^ m054 |  390                     |   2        |         | 
-^ m055 |  400/420                 |   4        |         | +^ m055 |  400/410                 |   4        |         | 
-^ m056 |  420                     |   1        |         | +^ m056 |  420                     |   1        | from previous obs, not included in last        | 
-^ m057 |  380/400                 |   1        |         | +^ m057 |  370/380                 |   1        |         | 
-^ m058 |  400                     |   4        |         |+^ m058 |  450/390                 |   4        |         |
 ^ m059 |  370/400                 |   2        |         | ^ m059 |  370/400                 |   2        |         |
-^ m060 |  400/**430**             |   1        |         | +^ m060 |  430                     |   1        |         | 
-^ m061 |  410/400                 |   2        |         | +^ m061 |  410                     |   2        |         | 
-^ m062 |  **420**/410             |   2        | **first polarisation strange variations with frequency**  | +^ m062 |  420/400                 |   2        | **high bumps in first polarisation**  | 
-^ m063 |  400                     |   2        |         |+^ m063 |  390/400                 |   2        |         | 
 + 
 +Three receivers/antennas (m015,m036,m062) are having problems at the moment. The others are all good, but have slightly different SEFD levels. 
 + 
  
-Total good: 54, minor issues: 7, bad: 1, no signal yet: 2+==== Noise variations ====
  
 +[[projects:mkat_sband:pub:noisevar|Analysis of several types of system noise variations]]
  
 
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