| 摘要 |
For reducing the data age of image products obtained using a corresponding constellation of earth observation satellites, it is provided that, using a first earth observation satellite (Sat1) of the constellation, which satellite is outside the receiving region (32) of a user ground station (2), a picture is taken of a target region (P), and the picture is stored in the form of digital image data in the first earth observation satellite (Sat1). The stored digital image data are transmitted to a mailbox ground station (1) provided in a region flown over by all earth observation satellites (Sat1 to Sat3), when the first earth observation satellite (Sat1) has reached the receiving region of the mailbox ground station (1), and the digital image data are then temporarily stored in the mailbox ground station. The image data of the target region (P) temporarily stored in the mailbox ground station (1) are transmitted to a further earth observation satellite (Sat2) moving into the receiving region (31) of the mailbox ground station (1). When the further earth observation satellite (Sat2) enters the receiving region (32) of a user ground station (2), the image data stored in its on-board memory are transferred to the user ground station (2). |
