Fig. 1From: Akatsuki LIR observing system simulation experiments evaluated by thermal tides in the Venus atmosphereLongitude–time cross sections of temperature (K) deviations at 70 km altitude and the equator. a Free run forecast (frf) of AFES-Venus (without data assimilation), hourly observations on b global (h1), d dayside (h1_ds), e nightside (h1_ns), and c 6-hourly (h6) and f 24-hourly (h24) observations on global are shown, respectively. The black lines indicate the sub-solar pointBack to article page