GEZGIN-2: An advanced image processing subsystem for earth-observing small satellites

Ismailoglu, N
Benderli, O
Yesil, S
Sever, Ramazan
Okcan, B
Oktem, R
GEZGIN-2 is a real-time image processing subsystem, currently being developed for RASAT, the second small satellite to be launched by TUBITAK-BILTEN, in 2007. It is an advanced version of the GEZGIN payload, implementing JPEG 2000 image compression algorithm and currently flying on the BILSAT-1 satellite. The main enhancements in GEZGIN-2 are the integration of the full processing path of JPEG 2000 algorithm in a single Field Programmable Gate Array (FPGA) for increased processing performance and high speed data links complying with the ESA Spacewire standard, for data transfer at a rate of 100 Mbps. In addition to JPEG2000, GEZGIN-2 facilitates image pre-processing for cloud/sea detection and image/data encryption implemented on a daughter-board called GOLGE. As in GEZGIN, GEZGIN-2 allows for adjustment of compression ratio for different mission times by means of run-time supplied parameters and full reconfigurability in orbit.


GEZGIN & GEZGIN-2: Adaptive real-time image processing subsystems for earth observing small satellites
Ismailoglu, N.; Benderli, O.; Yesil, S.; Sever, Ramazan; Okcan, B.; Sengul, O.; Oktem, Rusen (2006-06-18)
GEZGIN and GEZGIN-2 are real-time multispectral image processing subsystems developedfor BILSAT-1 and RASAT satellites respectively, the first two earth observing small satellites of Turkey. Main functionality of these subsystems is to compress in real-time multi-spectral images received concurrently from imagers, using JPEG2000 Image Compression algorithm. The compression features are controlled through user-supplied parameters uploaded in-orbit, so that the compression rate could be adapted to bandwidth, ...
GEZGIN: A case study of a real-time image processing subsystem for micro-satellites
Ismailoglu, N; Benderli, O; Korkmaz, I; Yesil, S; Sever, Ramazan; Sunay, H; Kolcak, T; Tekmen, YC (2003-11-22)
GEZGIN is a real-time image processing subsystem, developed as an R&D payload for BILSAT-1, the first earth observing micro-satellite of Turkey. The main functionality of GEZGIN is to compress in real-time multi-spectral images coming concurrently from the 4-band multi-spectral imager on BILSAT-1, using JPEG2000 Image Compression algorithm. The mission definition of BILSAT-1 imposes a 5.5 seconds interval constraint between two consecutive multi-spectral images with 20% overlap. GEZGIN fullfills this missio...
GOLGE: A case study of a secure data communication subsystem for micro-satellites
Yesil, S; Sever, Ramazan; Okcan, B; Ismailoglu, N (2005-06-11)
This paper presents a real-time data encryption/decryption subsystem developed for a satellite, which is planned to be launched in 2007 by TUBITAK-BILTEN. The subsystem GOLGE contains two ASICs, which perform encryption/decryption using AES (Advanced Encryption Standard) and RSA (Rivest-Shamir-Adleman) algorithms and a communication interface unit. The data/command interface of the GOLGE module is implemented on a reconfigurable ASIC (FPGA), where the encryption/decryption processors have previously been de...
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Citation Formats
N. Ismailoglu, O. Benderli, S. Yesil, R. Sever, B. Okcan, and R. Oktem, “GEZGIN-2: An advanced image processing subsystem for earth-observing small satellites,” 2005, p. 605, Accessed: 00, 2020. [Online]. Available: