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fix(rfi): revisit frequency mask #103

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fix(rfi): revisit frequency mask #103

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7fd11cd
fix(rfi): sync RFI mask with wtl.broker-utils
rikvl Nov 24, 2025
47d8d5d
fix(rfi): add 650MHz band to mask
rikvl Nov 24, 2025
89f4b0c
shorten comments for ruff
rikvl Nov 24, 2025
f4ada37
resolve discrepancy
rikvl Nov 24, 2025
4b0a13c
fix upper edge of 650 MHz band
rikvl Nov 26, 2025
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65 changes: 45 additions & 20 deletions ch_util/rfi.py
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Original file line number Diff line number Diff line change
Expand Up @@ -43,47 +43,72 @@
# Ranges of bad frequencies given by their start time (in unix time) and
# corresponding start and end frequencies (in MHz)
# If the start time is not specified, t = [], the flag is applied to all CSDs
# When making changes here, please also update the list in wtl.broker-utils
BAD_FREQUENCIES = {
"chime": [
### Bad bands at first light
# Bad band at first light.
[[None, None], [449.41, 450.98]],
# Bad band at first light.
[[None, None], [454.88, 456.05]],
# Bad band at first light.
[[None, None], [457.62, 459.18]],
# Narrow, high power band visible in sensitivities and some longer
# baselines. There is some sporadic RFI near this band
[[None, None], [460.15, 460.55]],
# Persistent, bright narrow line.
# Added to mask during Dec 2023 update.
[[1700573980, None], [464.45, 465.24]],
# Persistent, bright narrow line.
# Added to mask during Dec 2023 update.
[[1700573980, None], [468.75, 469.54]],
# Bad band at first light.
[[None, None], [483.01, 485.35]],
# Bad band at first light.
# UHF TV Channel 17, broadcast out of Omak.
[[None, None], [487.70, 494.34]],
# Bad band at first light.
# UHF TV Channel 19, broadcast out of Omak.
[[None, None], [497.85, 506.05]],
[[None, None], [529.10, 536.52]],
[[None, None], [541.60, 548.00]],
### Additional bad bands
# Narrow, high power bands visible in sensitivities and
# some longer baselines. There is some sporadic rfi in between
# the two bands
[[None, None], [460.15, 460.55]],
[[None, None], [464.00, 470.32]],
# 6 MHz band (reported by Simon)
[[None, None], [505.85, 511.71]],
# 6 MHz band (reported by Simon).
# Excluded from gain calibration during Dec 2023 update.
[[None, 1700573980], [505.85, 511.71]],
# Bright band which has been present since early on
[[None, None], [517.97, 525.00]],
# Bad band at first light.
[[None, None], [529.10, 536.52]],
# Bad band at first light.
# UHF TV Channel 26 turned off on CSD 3440 (2023/04/07).
# Extended until CSD 3446 (2023/04/14) to account for stale digital gains.
[[None, 1681448064], [541.60, 548.00]],
# UHF TV Channel 27 ending CSD 3212 inclusive (2022/08/24)
# This is extended until CSD 3446 (2023/04/13) to account for gain errors
[[None, 1681410777], [548.00, 554.49]],
# Extended until CSD 3446 (2023/04/14) to account for stale digital gains.
[[None, 1681448064], [548.00, 554.49]],
# UHF TV Channel 30/31. 31 broadcast out of Omak.
[[None, None], [564.65, 578.00]],
# UHF TV Channel 32 ending CSD 3213 inclusive (2022/08/25)
# This is extended until CSD 3446 (2023/04/13) to account for gain errors
[[None, 1681410777], [578.00, 585.35]],
# from CSD 2893 (2021/10/09 - ) UHF TV Channel 33 (reported by Seth)
# Extended until CSD 3446 (2023/04/14) to account for stale digital gains.
[[None, 1681448064], [578.00, 585.35]],
# UHF TV Channel 33 from CSD 2893 (2021/10/09). Broadcast out of Omak.
[[1633758888, None], [584.00, 590.00]],
# UHF TV Channel 35
# UHF TV Channel 35 from CSD 2893 (2021/10/09). Broadcast out of Omak.
[[1633758888, None], [596.00, 602.00]],
# Low power band visible in long baselines
[[None, None], [602.00, 607.82]],
# from CSD 2243 (2019/12/31 - ) Rogers’ new 600 MHz band
# Rogers’ new 600 MHz band from CSD 2243 (2019/12/31)
[[1577755022, None], [617.00, 627.00]],
# Bells’ new 600 MHz band from CSD 2642 (2021/02/01), turned on gradually.
[[1612137600, None], [627.00, 637.00]],
# Freedom's new 600 MHz band from CSD 2642 (2021/02/01), turned on gradually.
[[1612137600, None], [637.00, 642.00]],
# Freedom's new 600 MHz band from CSD 4383 (2025/11/03)
[[1762177500, None], [642.00, 652.00]],
# Bad band at first light.
[[None, None], [693.16, 693.55]],
# Bad band at first light.
[[None, None], [694.34, 696.68]],
# from CSD 2080 (2019/07/21 - ) Blobs, Channels 55 and 56
[[1564051033, None], [716.00, 728.00]],
# Bad band at first light.
[[None, None], [729.88, 745.12]],
# Bad band at first light.
[[None, None], [746.29, 756.45]],
],
"kko": [
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