Gate: PSMSL Constanța (13 Nov 2026)

Brief gate: the PSMSL RLR annual series must span at least 60 years with fewer than 15% of years missing.

• Station: 379 CONSTANTZA, 44.1667 N 28.6667 E, found in the PSMSL RLR filelist (rlr_annual/filelist.txt, line "379; 44.166667; 28.666667; CONSTANTZA; 297; 021; N"). PSMSL coastline/station code 297/021. Not guessed: read from the file downloaded from psmsl.org/data/obtaining/rlr.annual.data/rlr_annual.zip on 13 Nov 2026.
• Series file: raw/379.rlrdata, SHA-256 39f42789082fc03f566bf9271839f3e8fe898abcb92bf4106a0c340f30dfe8de.
• Span 1933–1996 = 64 calendar years. Years with a value: 59. Missing (flag -99999): 1935, 1944, 1980, 1986, 1993 = 5 of 64 = 7.8%.
• Gate result: PASSES (64 ≥ 60 years; 7.8% < 15%).
• Two years carry the PSMSL quality flag Y (1985, 1992). They are kept in the main fit and dropped in a sensitivity run.
• What the gate does not say: the RLR series ends in 1996 (monthly metric series ends December 1997). The brief's "close to a century" is wrong: it is 64 years, ending 30 years ago. The page says so.
• Live gauges exist today (IOC sea level monitoring csta2, csta3, operated by INFP) but no published datum tie to the 1933 RLR datum was found for them, so they are not spliced. NIMRD holds a datum-tied continuation (monthly 1998–2018, request-only); see PREREG correction 8.
• The AR6 tool's location id 379 is the same PSMSL id (file location_list.lst: "CONSTANTZA 379 44.17 28.67", index 230 in the NetCDF locations array), so AR6 values are for the gauge itself, not a nearby grid point.

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