Terra MODIS Level-2 Regional 4µm Day/Night Sea Surface Temperature (SST4) Data, version R2019.0

These channels are typically used at night (to avoid solar contamination) and can offer reduced sensitivity to atmospheric water vapor compared with long-wave (11/12 µm) split-window SST, making SST4 a valuable complement in humid or tropical conditions. Geophysical variables in this suite include: - bias_sst4 — 4 µm Sea Surface Temperature bias (°C) - flags_sst4 — Product-specific flags, 4 µm Sea Surface Temperature (integer bitmask) - l2_flags — Level-2 Processing Flags (integer bitmask; see bit definitions) - qual_sst4 — Quality levels for 4 µm Sea Surface Temperature (integer quality flag) - sst4 — 4 µm Sea Surface Temperature (°C) - sstref — Sea Surface Temperature reference (°C) - stdv_sst4 — 4 µm Sea Surface Temperature standard deviatio (°C