ATOM: Super Compact and Flexible Format to Store and Transmit GNSS Data

Igor Artushkin, Aleksey Boriskin, Dmitry Kozlov

Abstract:	GNSS data (observables, corrections, positioning results etc) are usually stored in some memory for post processing and/or sent through some data link for various real time applications. The problem of compact presentation of GNSS data can be very important in some cases. For example, some low band data links do not allow sending RTK observables/corrections at 1 Hz using standardized protocols like CMR and RTCM-3. This problem is even more important when data from more than one GNSS are to be transmitted (e.g. GPS+GLONASS). Another example is GPRS/NTRIP when data link has usually sufficient bandwidth, but user pay for the actual traffic. The more compact protocol is used, the lower expenses user has. So developing compact data formats which maximally effectively utilize data link bandwidth is very important task. The other issue related with data storage/transmission is growing GNSS. More and more GNSS appear and will appear in future. Each of them provides variety of signals and corresponding observables. So it is desirable to have some universal presentation format which can effectively serve any combination of GNSS and their particular observables. Given paper describes new ATOM™ format from Magellan for data storage/transmission. ATOM is organized as universal format capable of generating the following group of data: GNSS corrections, GNSS raw observables, receiver positioning results and attributes, Satellite navigation information. The most important groups are GNSS observables and corrections. ATOM allows different presentation options for these data, from most compact to most full. The paper gives the overview of ATOM format and provides throughput figures in comparison to existing formats.
Published in:	Proceedings of the 21st International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS 2008) September 16 - 19, 2008 Savannah International Convention Center Savannah, GA
Pages:	1895 - 1902
Cite this article:	Artushkin, Igor, Boriskin, Aleksey, Kozlov, Dmitry, "ATOM: Super Compact and Flexible Format to Store and Transmit GNSS Data," Proceedings of the 21st International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS 2008), Savannah, GA, September 2008, pp. 1895-1902.
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