MY 33 observations missing from region_names lookup

[michaelaye]

Problem

The v3.1 catalog contains 13 MY 33 observations, and they are present in the coverage file (FnotchCoverage_v3.1.csv). However, io.get_region_names() does not include them, so they are dropped from any analysis that joins on ROI.

Details

The 13 unmapped MY 33 observations fall into two spatial clusters:

Lat	N obs	Likely ROI
-86.39	5	Manhattan Classic
-85.05 to -85.15	8	Macclesfield / Ithaca area

Ls range: 182–305°, providing good seasonal coverage.

Suggested fix

Assign ROIs to these 13 obsids by nearest-neighbor matching against the existing regions table (same method used for MY 28–32), then regenerate the region_names data file.

Obsids

ESP_046642_0935  Ls=182.4  lat=-86.39
ESP_046769_0950  Ls=188.0  lat=-85.14
ESP_046770_0950  Ls=188.1  lat=-85.14
ESP_046862_0950  Ls=192.2  lat=-85.07
ESP_046971_0935  Ls=197.2  lat=-86.39
ESP_047103_0935  Ls=203.3  lat=-86.39
ESP_047327_0935  Ls=213.9  lat=-86.39
ESP_047363_0950  Ls=215.6  lat=-85.06
ESP_047653_0950  Ls=229.7  lat=-85.05
ESP_047696_0935  Ls=231.8  lat=-86.39
ESP_048431_0950  Ls=268.1  lat=-85.05
ESP_048576_0950  Ls=275.2  lat=-85.06
ESP_049209_0950  Ls=305.2  lat=-85.15