XW-4
（
CAS-10
）
Amateur Radio Satellite User's Manual
19
/
31
V2.0 by BA1DU
龚万骢
4
、
Space camera photo data
：
XW-4 (CAS-10) satellite can store up to 10 photos taken by the space camera. The newly
taken photo data will overwrite the old photo data, first in, first out. There are two photo
resolutions, one is 256x256 pixels, and the data size of each photo is 64k bytes; the
other is 512x512 pixels, and the data size of each photo is 256k bytes. Users can
download the photo catalog information to learn about the photos stored on the
satellite, and select the photos to download.
（
1
）
Photo catalog information
XW-4 (CAS-10) satellite photo catalog information is stored in the flash memory on the
satellite in the following format.
Function code
Photo catalog information content
7Byte
80Byte
W0~W6
：
0x02000100010057
W7~W86
Photo storage information content
Article 1 Photo storage
information
Article 2 Photo storage
information
……
Article 10 Photo storage
information
8Byte
8Byte
……
8Byte
The format of each photo catalog information is shown in the following table:
1Byte 1Byte 1Byte 1Byte 1Byte 1Byte
1Byte
1Byte
Year
Month
Day
Hour
Minute
Second
bit7~Bit3
Bit2~Bit0
1Byte
Photograph time
Camera
number
Photo counter
1
）
Year, month, day, hour, minute, and second:
the time when the photo data
