Update on MSK (Minimum Shift Keying) Receivers for Radiobeacon DGPS Broadcasts

Michael S.K. Sushko

Abstract:	There are currently several active USCG radiobeacon sites providing a daily prototype DGPS correction broadcast. An MSK receiver is required in order to receive the DGPS corrections from a radiobeacon site. The DGPS corrections are provided by the USCG in the RTCM 104 format. The MSK receiver is used to demodulate the broadcasted DGPS corrections. The corrections are applied to a connected GPS receiver. The first commercial MSK receiver products from manufacturers appeared in 1991. Since that time, there has been a change in the commercial MSK receiver marketplace. One manufacturer has dropped their MSK receiver product while other manufacturers have updated their MSK receivers with improved features. There has also been new MSK receiver product announcements from companies with no previous MSK receiver product. This paper reviews the current commercial MSK receiver product market and includes MSK receiver specifications, features and cost. The paper also reviews changes made to the USCG Radiobeacon DGPS Broadcast Standard since last year and reviews USCG planned installations of additional DGPS broadcast sites. This paper is an update of our paper presented last year at ION on MSK receivers for the USCG DGPS broadcasts.
Published in:	Proceedings of the 49th Annual Meeting of The Institute of Navigation (1993) June 21 - 23, 1993 Royal Sonesta Hotel Cambridge, MA
Pages:	689 - 706
Cite this article:	Sushko, Michael S.K., "Update on MSK (Minimum Shift Keying) Receivers for Radiobeacon DGPS Broadcasts," Proceedings of the 49th Annual Meeting of The Institute of Navigation (1993), Cambridge, MA, June 1993, pp. 689-706.
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