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Table 3 Mission requirements for the spatial and temporal coverage of the EXI instrument subdivided into the diurnal, geographic, and seasonal parts. Adapted from AlShamsi et al. (2017)

From: Scientific innovations from the Mars aerosol optical depth based on satellite data with a temporal resolution of hours

EXI coverage requirements
Diurnal requirements In any given span of 10 days, the four 3-h intervals spanning from 6 am to 6 pm local time are sampled with at least 80% longitude coverage in: ≥ 3 local time intervals for all latitudes equatorward of ± 30° ≥ 2 local time intervals for all latitudes equatorward of ± 50°. In any given span of 10 days, at least one of the four 3-h intervals spanning from 6 am to 6 pm local time is sampled with at least 50% longitude coverage for all latitudes equatorward of ± 80°.
Geographic requirements ≥ 80% of the Mars geographic area is sampled more frequently than every 72 h. Latitudes ≤ 80° are sampled more frequently than every 72 h.
Seasonal requirements Observations over one full Martian year (goal: 20 out of the 24 LS intervals of 15° are included).