The *.msk format follows below. I will also send you an email with the access data for our ftp server so that you can download the updated file format documentation, in case you need it.

Best,
Hester

Header
Nr of Bytes: Datatype: Default: Description

2: short int: 3: VTC resolution in mm
2: short int: 57: Start position of x-dimension VTC with respect to VMR
2: short int: 231: End position of x-dimension VTC
2: short int: 52: Start position of y-dimension VTC with respect to VMR
2: short int: 172: End position of y-dimension VTC
2: short int: 59: Start position of z-dimension VTC with respect to VMR
2: short int: 197: End position of z-dimension VTC