{"id":605,"date":"2019-09-16T18:27:43","date_gmt":"2019-09-16T18:27:43","guid":{"rendered":"https:\/\/geekblog.febo.com\/?p=605"},"modified":"2019-09-16T18:28:37","modified_gmt":"2019-09-16T18:28:37","slug":"gps-survey-first-results","status":"publish","type":"post","link":"https:\/\/blog.febo.com\/?p=605","title":{"rendered":"GPS Survey — First Results"},"content":{"rendered":"\n

Now that I have my GPS antennas permanently mounted on my tower, I’ve done a first set of measurements to determine the precise antenna location. I collected data for 48 hours on three receivers (Trimble NetRS, Ashtech ZREF, and Ashtech microZ) and fed the results to two processing services (Opus<\/a> and NRCan PPP<\/a>). The ZREF receiver had some sort of problem and generated a lot of bogus data, so I am not including its results here. Here are the outputs from each service for the NetRS and microZ, using the “rapid” orbital data (the “final” data will be available in a week or two and I’ll update this post when it is, but the difference will be small).<\/p>\n\n\n\n

OPUS<\/strong><\/td>Lat<\/strong><\/td>Lon<\/strong><\/td>Ellipsoid<\/strong><\/td>Ortho<\/strong><\/td><\/tr>
NetRS<\/td>39 4x 4x.64309<\/td>-84 1x 4x.50114<\/td>248.344<\/td>281.541<\/td><\/tr>
RMS: 0.025(m)<\/td>0.006(m)<\/td>0.007(m)<\/td>0.013(m)<\/td><\/td><\/tr>
microZ<\/td>39 4x 4x.64288<\/td>-84 1x 4x.50088<\/td>248.356<\/td>281.553<\/td><\/tr>
RMS: 0.024(m)<\/td>0.007(m)<\/td>0.015(m)<\/td>0.007(m<\/td><\/td><\/tr>
NRCan<\/strong><\/td>
<\/td>
<\/td>
<\/td>
<\/td><\/tr>
NetRS<\/td>39 4x 4x.6426<\/td>-84 1x 4x.50052<\/td>248.382<\/td><\/td><\/tr>
<\/td>0.004(m)<\/td>0.007(m)<\/td>0.014(m)<\/td><\/td><\/tr>
microZ<\/td>39 4x 4x.64264<\/td>-84 1x 4x.48363<\/td>248.347<\/td><\/td><\/tr>
<\/td>0.004(m)<\/td>0.008(m)<\/td>0.014(m)<\/td><\/td><\/tr><\/tbody><\/table><\/div>\n\n\n\n

NOTE 1: I’ve deleted a few digits in the middle to make ICBM targeting more difficult.<\/p>\n\n\n\n

NOTE 2: Opus results are NAD83(2011); NRCan results are NAD83(CSRS) (2019)
<\/p>\n\n\n\n

<\/p>\n\n\n\n

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

Now that I have my GPS antennas permanently mounted on my tower, I’ve done a first set of measurements to determine the precise antenna location. I collected data for 48…<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_lmt_disableupdate":"","_lmt_disable":"","ngg_post_thumbnail":0,"footnotes":""},"categories":[54],"tags":[65,68,67,66],"class_list":["post-605","post","type-post","status-publish","format-standard","hentry","category-gps","tag-gps","tag-nrcan","tag-opus","tag-survey"],"_links":{"self":[{"href":"https:\/\/blog.febo.com\/index.php?rest_route=\/wp\/v2\/posts\/605","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/blog.febo.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/blog.febo.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/blog.febo.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/blog.febo.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=605"}],"version-history":[{"count":2,"href":"https:\/\/blog.febo.com\/index.php?rest_route=\/wp\/v2\/posts\/605\/revisions"}],"predecessor-version":[{"id":607,"href":"https:\/\/blog.febo.com\/index.php?rest_route=\/wp\/v2\/posts\/605\/revisions\/607"}],"wp:attachment":[{"href":"https:\/\/blog.febo.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=605"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blog.febo.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=605"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blog.febo.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=605"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}