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LINE SYNC Code :
LINE SYNC Code :
MNFS (MiNor Frame Sync) Code:
MNFS (MiNor Frame Sync) Code:
111110 10111 001100 110100 000000 (30bits)
000001 01000 110011 001011 111111 (80bits)
101101 11000 (11bits)
010010 00111 (11bits)
Fig.3 : Downlink data format of JERS-1 OPS
4. Programmable formatter system
It is a very important point in formatter
system to keep high efficiency of processing
speed when serial data is reproduced from
HDDR.Howeverif the ratio of hardware
processing too high the multiusability drops.By
our system, processing by the hardware is only
limited to detection of minor frame and addition
the time code for format processing as shown on
210
Fig.4.This system is allows to take
synchronization by only setting a parameter in
programmable sync hardware for various minor
frame patterns.It adapts to many downlink
data format without changing the
hardware.Processing difference due to types of
sensor or satellites are solved by a software on a
WS with high speed and high multiusability.
International Archives of Photogrammetry and Remote Sensing. Vol. XXXI, Part B1. Vienna 1996