HRC event 0 files have "status" informaiton. In computing the stowed background, we set the mask to status=xxxxxx00xxxx0xxx00000000xx000000, but the mask can be different for each observer's need. Here is the table of bit entries.
| Bit 1 | Ringing corrected, V-axis | Bit 17 | Event in Bad Region | Bit 2 | Ringing corrected, U-axis | Bit 18 | Tap total on U- or V-axis <= 0 | Bit 3 | - spare - | Bit 19 | Bad CRSV (AV1 or AV3 > AV2) | Bit 4 | - spare - | Bit 20 | Bad CRSU (AU1 or AU2 > AU2) | Bit 5 | Shifted event time | Bit 21 | PHA-ratio test failed | Bit 6 | Next-in-line mode telemetry | Bit 22 | Sum of 6 taps = 0 | Bit 7 | No-trigger, V-axis | Bit 23 | Grid-ratio test failed | Bit 8 | No-trigger, U-axis | Bit 24 | ADC sum on U- or V-axis = 0 | Bit 9 | Center-blank, V-axis | Bit 25 | PI > 255 | Bit 10 | Center-blank, U-axis | Bit 26 | Out of time-sequence | Bit 11 | Width exceeded, V-axis | Bit 27 | Flatness test failed, V-axis | Bit 12 | Width exceeded, U-axis | Bit 28 | Flatness test failed, U-axis | Bit 13 | Antico-shield active | Bit 29 | Saturation test failed, V-axis | Bit 14 | - spare - | Bit 30 | Saturation test failed, U-axis | Bit 15 | ULD exceeded | Bit 31 | H-test failed, V-axis | Bit 16 | LLD not exceeded | Bit 32 | H-test failed, U-axis |
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