Index: /branches/BNC_2.12/src/bnchelp.html =================================================================== --- /branches/BNC_2.12/src/bnchelp.html (revision 8101) +++ /branches/BNC_2.12/src/bnchelp.html (revision 8102) @@ -3942,7 +3942,6 @@
  • ETRF2000 which stands for the European Terrestrial Reference Frame 2000 adopted by EUREF, and
  • NAD83 which stands for the North American Datum 1983 as adopted for the U.S.A., and
    • -
  • GDA94 which stands for the Geodetic Datum Australia 1994 as adopted for Australia, and
    • +
  • GDA2020 which stands for the Geodetic Datum Australia 2020 as adopted for Australia, and
  • SIRGAS2000 which stands for the Geodetic Datum adopted for Brazil, and
    • -
  • SIRGAS95 which stands for the Geodetic Datum adopted e.g. for Venezuela, and
  • DREF91 which stands for the Geodetic Datum adopted for Germany, and
  • 'Custom' which allows a transformation of Broadcast Corrections from the IGS14 system to any other system through specifying up to 14 Helmert Transformation Parameters.
    • @@ -3960,5 +3959,5 @@

    -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. +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.

    @@ -3988,4 +3987,5 @@ To: 2000.0 +In order to perform a transformation 'ITRF2014->ETRF2000', a transformation from 'ITRF2014->ITRF2008' is done at first.

    @@ -4011,26 +4011,27 @@ To: 1997.0 -

    - -

    -GDA94: 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), 189-199, de Gruyter 2010. DOI 10.1515/JAG.2010.019'. -

    -

    -

    -Translation in X at epoch To: -0.08468 m
-Translation in Y at epoch To: -0.01942 m
-Translation in Z at epoch To:  0.03201 m
-Translation rate in X:  0.00142 m/y
-Translation rate in Y:  0.00134 m/y
-Translation rate in Z:  0.00090 m/y
-Rotation in X at epoch To:  0.4254 mas
-Rotation in Y at epoch To: -2.2578 mas
-Rotation in Z at epoch To: -2.4015 mas
-Rotation rate in X: -1.5461 mas/y
-Rotation rate in Y: -1.1820 mas/y
-Rotation rate in Z: -1.1551 mas/y
-Scale at epoch To : 0.000000009710
-Scale rate: 0.000000000109 /y
-To: 1994.0
+In order to perform a transformation 'ITRF2014->NAD83', a transformation 'ITRF2014->ITRF2008' is done at first.
+
    
+
+
    
+GDA2020: 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'.
+
    
+
    
+
    +Translation in X at epoch To:  0.0 m
+Translation in Y at epoch To:  0.0 m
+Translation in Z at epoch To:  0.0 m
+Translation rate in X:  0.0 m/y
+Translation rate in Y:  0.0 m/y
+Translation rate in Z:  0.0 m/y
+Rotation in X at epoch To:  0.0 mas
+Rotation in Y at epoch To:  0.0 mas
+Rotation in Z at epoch To:  0.0 mas
+Rotation rate in X:  1.50379 mas/y
+Rotation rate in Y:  1.18346 mas/y
+Rotation rate in Z:  1.20716 mas/y
+Scale at epoch To :  0.0
+Scale rate:  0.0/y
+To: 2020.0
 
    
 
    
@@ -4047,36 +4048,13 @@
 Translation rate in Y:  0.0000 m/y
 Translation rate in Z:  0.0000 m/y
-Rotation in X at epoch To:  0.170 mas
-Rotation in Y at epoch To: -0.030 mas
-Rotation in Z at epoch To:  0.070 mas
+Rotation in X at epoch To:  0.0000 mas
+Rotation in Y at epoch To:  0.0000 mas
+Rotation in Z at epoch To:  0.0000 mas
 Rotation rate in X:  0.000 mas/y
 Rotation rate in Y:  0.000 mas/y
 Rotation rate in Z:  0.000 mas/y
-Scale at epoch To : -0.000000001000
+Scale at epoch To :  0.000
 Scale rate: 0.000000000000 /y
-To: 0000.0
-
    -

    - -

    -SIRGAS95: The formulas for the transformation 'ITRF2005->SIRGAS95' were provided via personal communication from Gustavo Acuha, Laboratorio de Geodesia Fisica y Satelital at Zulia University (LGFS-LUZ), 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.. -

    -

    -

    -Translation in X at epoch To:  0.0077 m
-Translation in Y at epoch To:  0.0058 m
-Translation in Z at epoch To: -0.0138 m
-Translation rate in X:  0.0000 m/y
-Translation rate in Y:  0.0000 m/y
-Translation rate in Z:  0.0000 m/y
-Rotation in X at epoch To:  0.000 mas
-Rotation in Y at epoch To:  0.000 mas
-Rotation in Z at epoch To: -0.003 mas
-Rotation rate in X:  0.000 mas/y
-Rotation rate in Y:  0.000 mas/y
-Rotation rate in Z:  0.000 mas/y
-Scale at epoch To : 0.00000000157
-Scale rate: -0.000000000000 /y
-To: 1995.4
+To: 20000.4

    @@ -4103,4 +4081,5 @@ To: 2000.0 +In order to perform a transformation 'ITRF2014->DREF91', a transformation from 'ITRF2014->ITRF2008' is done at first.

    @@ -5228,5 +5207,5 @@ FKPFlächen-Korrektur-Parameter FTPFile Transfer Protocol -GDA94Geodetic Datum Australia 1994 +GDA2020Geodetic Datum Australia 2020 GMGoogle Maps GNSSGlobal Navigation Satellite System @@ -5280,5 +5259,4 @@ SINEXSolution Independent Exchange Format SIRGAS2000Geodetic Datum for Latin America and Caribbean 2000 -SIRGAS95Geodetic Datum for Latin America and Caribbean 1995 SIRGASIAG Reference Frame Sub-Commission for Latin America and Caribbean SP3Standard Product # 3