{"id":5831,"date":"2018-11-08T23:43:19","date_gmt":"2018-11-08T23:43:19","guid":{"rendered":"https:\/\/www.use-snip.com\/kb\/?post_type=ht_kb&p=5831"},"modified":"2021-06-10T23:21:44","modified_gmt":"2021-06-10T23:21:44","slug":"decoding-msm-messages","status":"publish","type":"ht_kb","link":"https:\/\/www.use-snip.com\/kb\/knowledge-base\/decoding-msm-messages\/","title":{"rendered":"Decoding MSM messages"},"content":{"rendered":"

SNIP<\/strong><\/span> supports the detailed decoding of all the MSM style RTCM3.x messages<\/a>.\u00a0 This article briefly covers the new features (added in release 2.06).\u00a0\u00a0 The basics of the RTCM Decoder dialog<\/strong> are covered in this article<\/a>.\u00a0 This is a powerful tool is intended to assist the SNIP<\/strong><\/span> operator when any questions about the data stream contents arise.<\/p>\n

The Universal Decoder<\/strong> <\/a>and the ability to right-click<\/em> and use the Show Message type<\/strong><\/em> menu are also helpful tools.<\/p>\n

Additional Message Types<\/h3>\n

Simply put, the decoder now provides the same table & tree view for MSM messages as it does for the legacy messages.\u00a0 Support includes MSM3, MSM4, MSM5, MSM6 and MSM7 messages.\u00a0 And this is for all GNSS systems; GPS, GLO, GAL, QZSS, SBAS and Beidou\/Compass. [click to enlarge image]<\/p>\n

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Support for the new MT1230 message (the GLO Signal Bias message) has also be added<\/p>\n

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And support for legacy MT1003 and MT1011 messages (a rarely used L1\/L2 message but without any SNR data) has also been added<\/p>\n

Support for the newest adopted Ephemerides<\/strong> messages (MT1042, MT1044, MT1045, MT1046) has also been added (older messages MT1019 (GPS) and MT1020 (GLO) were already present). These messages support the new GNSS types supported by MSM with basic orbital data.<\/p>\n

Support for L3 \/L5 signals<\/h3>\n

Display of the newer L5 \/ Lx signals has also been added, displaying a third frequency band when one is present.\u00a0 As the image below demonstrates, this can produce rather large tables (click to enlarge).\u00a0\u00a0 Development in this area will continue as more Space Vehicles (SVs) with the new signals continue to come on-line and be defined by RTCM SC-104.<\/p>\n

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The Use of Color<\/h3>\n

The improved display now uses a simple highlight color indicate if a given message has been changed due to PFAT settings<\/a>.<\/p>\n