FAQ

    Q
    How to find around Japan data.
    A
    You can find the Shikisai/SGLI observation date/time around Japan from the following site and way.
    • The observation schedule in "SHIKISAI-Portal"
    • Calculate using the orbit prediction software (ex.STK)[two-line elements]
    • Confirm from observation data 34 days ago (regression days) (Note 1)
    (Note1) Because Shikisai orbit ground trace is repeated in every 34 days, the same area in 34 days ago is observed. It's possible to choose around Japan data by the pass number, scene number and tile number included in the granule ID.
    Please refer (Q. What is Shikisai file naming rule?) for how to read the granule ID.

    Scene (daytime): pass number = 020-080, scene number = 08-12
    Scene (nighttime): pass number = 250-320, scene number = 02-05
    Tile: Tile number = 0428, 0429, 0528, 0529, 0629
    How to find around Japan data
    For information more methods, please refer to FAQ"Map projection (each product)", FAQ"Path and Scene Definition", FAQ"about tile products".
    Last update: 2024/11/22