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branches/BNC_2.12/src/bnchelp.html
r8089 r8102 3942 3942 <li>ETRF2000 which stands for the European Terrestrial Reference Frame 2000 adopted by EUREF, and</li> 3943 3943 <li>NAD83 which stands for the North American Datum 1983 as adopted for the U.S.A., and</li> 3944 <li>GDA 94 which stands for the Geodetic Datum Australia 1994as adopted for Australia, and</li>3944 <li>GDA2020 which stands for the Geodetic Datum Australia 2020 as adopted for Australia, and</li> 3945 3945 <li>SIRGAS2000 which stands for the Geodetic Datum adopted for Brazil, and</li> 3946 <li>SIRGAS95 which stands for the Geodetic Datum adopted e.g. for Venezuela, and</li>3947 3946 <li>DREF91 which stands for the Geodetic Datum adopted for Germany, and</li> 3948 3947 <li>'Custom' which allows a transformation of Broadcast Corrections from the IGS14 system to any other system through specifying up to 14 Helmert Transformation Parameters.</li> … … 3960 3959 </p> 3961 3960 <p> 3962 From a theoretical point of view, this kind of approximation leads to inconsistencies between orbits and clocks and is therefore not allowed (Huisman et al. 2012). However, it has been proved that resulting errors in Precise Point Positioning are on millimeter level for horizontal components and below one centimeter for height components. The Australian GDA94 transformation with its comparatively large scale parameter is an exception in this as discrepancies may reach up there to two centimeters.3961 From a theoretical point of view, this kind of approximation leads to inconsistencies between orbits and clocks and is therefore not allowed (Huisman et al. 2012). However, it has been proved that resulting errors in Precise Point Positioning are on millimeter level for horizontal components and below one centimeter for height components. 3963 3962 </p> 3964 3963 … … 3988 3987 To: 2000.0 3989 3988 </pre> 3989 In order to perform a transformation 'ITRF2014>ETRF2000', a transformation from 'ITRF2014>ITRF2008' is done at first. 3990 3990 </p> 3991 3991 … … 4011 4011 To: 1997.0 4012 4012 </pre> 4013 </p> 4014 4015 <p> 4016 <u>GDA94:</u> The formulas for the transformation 'ITRF2008>GDA94' are taken from 'John Dawson, Alex Woods 2010: ITRF to GDA94 coordinate transformations', Journal of Applied Geodesy, 4 (2010), 189199, de Gruyter 2010. DOI 10.1515/JAG.2010.019'. 4017 </p> 4018 <p> 4019 <pre> 4020 Translation in X at epoch To: 0.08468 m 4021 Translation in Y at epoch To: 0.01942 m 4022 Translation in Z at epoch To: 0.03201 m 4023 Translation rate in X: 0.00142 m/y 4024 Translation rate in Y: 0.00134 m/y 4025 Translation rate in Z: 0.00090 m/y 4026 Rotation in X at epoch To: 0.4254 mas 4027 Rotation in Y at epoch To: 2.2578 mas 4028 Rotation in Z at epoch To: 2.4015 mas 4029 Rotation rate in X: 1.5461 mas/y 4030 Rotation rate in Y: 1.1820 mas/y 4031 Rotation rate in Z: 1.1551 mas/y 4032 Scale at epoch To : 0.000000009710 4033 Scale rate: 0.000000000109 /y 4034 To: 1994.0 4013 In order to perform a transformation 'ITRF2014>NAD83', a transformation 'ITRF2014>ITRF2008' is done at first. 4014 </p> 4015 4016 <p> 4017 <u>GDA2020:</u> The formulas for the transformation 'ITRF2014>GDA2020' were provided via personal communication from Ryan Ruddick: 'Geocentric Datum of Australia 2020, Interim Release Note Version 1.01, Intergovernmental Committee on Surveying and Mapping (ICSM), Permanent Committee on Geodesy (PCG), 03 March 2017'. 4018 </p> 4019 <p> 4020 <pre> 4021 Translation in X at epoch To: 0.0 m 4022 Translation in Y at epoch To: 0.0 m 4023 Translation in Z at epoch To: 0.0 m 4024 Translation rate in X: 0.0 m/y 4025 Translation rate in Y: 0.0 m/y 4026 Translation rate in Z: 0.0 m/y 4027 Rotation in X at epoch To: 0.0 mas 4028 Rotation in Y at epoch To: 0.0 mas 4029 Rotation in Z at epoch To: 0.0 mas 4030 Rotation rate in X: 1.50379 mas/y 4031 Rotation rate in Y: 1.18346 mas/y 4032 Rotation rate in Z: 1.20716 mas/y 4033 Scale at epoch To : 0.0 4034 Scale rate: 0.0/y 4035 To: 2020.0 4035 4036 </pre> 4036 4037 </p> … … 4047 4048 Translation rate in Y: 0.0000 m/y 4048 4049 Translation rate in Z: 0.0000 m/y 4049 Rotation in X at epoch To: 0. 170 mas4050 Rotation in Y at epoch To: 0.030 mas4051 Rotation in Z at epoch To: 0.0 70 mas4050 Rotation in X at epoch To: 0.0000 mas 4051 Rotation in Y at epoch To: 0.0000 mas 4052 Rotation in Z at epoch To: 0.0000 mas 4052 4053 Rotation rate in X: 0.000 mas/y 4053 4054 Rotation rate in Y: 0.000 mas/y 4054 4055 Rotation rate in Z: 0.000 mas/y 4055 Scale at epoch To : 0.0000000010004056 Scale at epoch To : 0.000 4056 4057 Scale rate: 0.000000000000 /y 4057 To: 0000.0 4058 </pre> 4059 </p> 4060 4061 <p> 4062 <u>SIRGAS95:</u> The formulas for the transformation 'ITRF2005>SIRGAS95' were provided via personal communication from Gustavo Acuha, Laboratorio de Geodesia Fisica y Satelital at Zulia University (LGFSLUZ), parameters based on values from Table 4.1 of "Terrestrial Reference Frames (April 10, 2009), Chapter 4" in http://tai.bipm.org/iers/convupdt/convupdt_c4.html.</u>. 4063 </p> 4064 <p> 4065 <pre> 4066 Translation in X at epoch To: 0.0077 m 4067 Translation in Y at epoch To: 0.0058 m 4068 Translation in Z at epoch To: 0.0138 m 4069 Translation rate in X: 0.0000 m/y 4070 Translation rate in Y: 0.0000 m/y 4071 Translation rate in Z: 0.0000 m/y 4072 Rotation in X at epoch To: 0.000 mas 4073 Rotation in Y at epoch To: 0.000 mas 4074 Rotation in Z at epoch To: 0.003 mas 4075 Rotation rate in X: 0.000 mas/y 4076 Rotation rate in Y: 0.000 mas/y 4077 Rotation rate in Z: 0.000 mas/y 4078 Scale at epoch To : 0.00000000157 4079 Scale rate: 0.000000000000 /y 4080 To: 1995.4 4058 To: 20000.4 4081 4059 </pre> 4082 4060 </p> … … 4103 4081 To: 2000.0 4104 4082 </pre> 4083 In order to perform a transformation 'ITRF2014>DREF91', a transformation from 'ITRF2014>ITRF2008' is done at first. 4105 4084 </p> 4106 4085 … … 5228 5207 <tr><td>FKP</td><td>FlächenKorrekturParameter</td></tr> 5229 5208 <tr><td>FTP</td><td>File Transfer Protocol</td></tr> 5230 <tr><td>GDA 94</td><td>Geodetic Datum Australia 1994</td></tr>5209 <tr><td>GDA2020</td><td>Geodetic Datum Australia 2020</td></tr> 5231 5210 <tr><td>GM</td><td>Google Maps</td></tr> 5232 5211 <tr><td>GNSS</td><td>Global Navigation Satellite System</td></tr> … … 5280 5259 <tr><td>SINEX</td><td>Solution Independent Exchange Format</td></tr> 5281 5260 <tr><td>SIRGAS2000</td><td>Geodetic Datum for Latin America and Caribbean 2000</td></tr> 5282 <tr><td>SIRGAS95</td><td>Geodetic Datum for Latin America and Caribbean 1995</td></tr>5283 5261 <tr><td>SIRGAS</td><td>IAG Reference Frame SubCommission for Latin America and Caribbean</td></tr> 5284 5262 <tr><td>SP3</td><td>Standard Product # 3</td></tr>
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