{"id":5102,"date":"2018-03-10T17:36:22","date_gmt":"2018-03-10T17:36:22","guid":{"rendered":"https:\/\/www.use-snip.com\/kb\/?post_type=ht_kb&p=5102"},"modified":"2019-07-15T21:09:49","modified_gmt":"2019-07-15T21:09:49","slug":"removing-glonass-message-content","status":"publish","type":"ht_kb","link":"https:\/\/www.use-snip.com\/kb\/knowledge-base\/removing-glonass-message-content\/","title":{"rendered":"Removing GLONASS Message Content"},"content":{"rendered":"

This article shows how to set the the PFAT<\/strong> controls<\/a> to remove classical GLONASS RTCM 3.x messages (message types 1009~1012) from a stream, leaving only the GPS types.<\/p>\n

This action is often desired to create a new (smaller) stream without GLONASS message payloads for end users who do not need it.<\/p>\n

The resulting setting as shown by the PFAT summary dialog display is shown below.<\/p>\n

\"\"<\/p>\n

In this example we enable the following PFAT steps:<\/p>\n

    \n
  1. Parse<\/a> the RTCM3.x message<\/a> content to detect the message types<\/li>\n
  2. Filter<\/a> the GLONASS observational messages (in this case MT1012)<\/li>\n
  3. Translate<\/a> the message flags in the remaining GPS observational messages (in this case MT1004) to indicate that they are the last in the measurement epoch.<\/li>\n<\/ol>\n

    The resulting final stream contains MT1004 ( the raw GPS observations) and MT1005 (the ECEF location of the Base Station).<\/p>\n

    If any GLONASS orbital data is present (MT 1019), that could be filtered as well.<\/p>\n

    If an offset to a new datum<\/a> is required, an additional translation step could be added.<\/p>\n

    The tool-tip<\/a> for this stream also summarizes the PFAT operations that have been performed on it.<\/p>\n

    \"\"<\/p>\n","protected":false},"excerpt":{"rendered":"

    This article shows how to set the the PFAT controls to remove classical GLONASS RTCM 3.x messages (message types 1009~1012) from a stream, leaving only the GPS types. This action is often desired to create a new (smaller) stream without GLONASS message payloads for end users who do not need […]<\/p>\n","protected":false},"author":13,"comment_status":"open","ping_status":"closed","template":"","format":"standard","meta":{"_exactmetrics_skip_tracking":false,"_exactmetrics_sitenote_active":false,"_exactmetrics_sitenote_note":"","_exactmetrics_sitenote_category":0,"footnotes":""},"ht-kb-category":[334],"ht-kb-tag":[411,412,381],"class_list":["post-5102","ht_kb","type-ht_kb","status-publish","format-standard","hentry","ht_kb_category-advanced-topics","ht_kb_tag-glo","ht_kb_tag-mt1012","ht_kb_tag-pfat"],"_links":{"self":[{"href":"https:\/\/www.use-snip.com\/kb\/wp-json\/wp\/v2\/ht-kb\/5102","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.use-snip.com\/kb\/wp-json\/wp\/v2\/ht-kb"}],"about":[{"href":"https:\/\/www.use-snip.com\/kb\/wp-json\/wp\/v2\/types\/ht_kb"}],"author":[{"embeddable":true,"href":"https:\/\/www.use-snip.com\/kb\/wp-json\/wp\/v2\/users\/13"}],"replies":[{"embeddable":true,"href":"https:\/\/www.use-snip.com\/kb\/wp-json\/wp\/v2\/comments?post=5102"}],"version-history":[{"count":6,"href":"https:\/\/www.use-snip.com\/kb\/wp-json\/wp\/v2\/ht-kb\/5102\/revisions"}],"predecessor-version":[{"id":5144,"href":"https:\/\/www.use-snip.com\/kb\/wp-json\/wp\/v2\/ht-kb\/5102\/revisions\/5144"}],"wp:attachment":[{"href":"https:\/\/www.use-snip.com\/kb\/wp-json\/wp\/v2\/media?parent=5102"}],"wp:term":[{"taxonomy":"ht_kb_category","embeddable":true,"href":"https:\/\/www.use-snip.com\/kb\/wp-json\/wp\/v2\/ht-kb-category?post=5102"},{"taxonomy":"ht_kb_tag","embeddable":true,"href":"https:\/\/www.use-snip.com\/kb\/wp-json\/wp\/v2\/ht-kb-tag?post=5102"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}