It looks like as of today the new CORS coordinates have been implemented for OPUS positions:
IGS08 Epoch 2005.00
NAD 83(2011) Epoch 2010.00
For a limited time you can still get
ITRF00 Epoch 1997.00
NAD 83(CORS96) Epoch 2002.00
BUT this will soon go away.
Read about the New Coordinates here.
From the link AND VERY important: "With the introduction of ITRF2008 and IGS08 (actually IGS05 but this frame was never implemented by NGS), a completely new absolute calibration technique was used to generate antenna calibrations. Furthermore since the absolute antenna calibrations also include calibrations for satellite antennas as well as ground antennas they are revised periodically and are defined for a specific reference frame. NGS has updated its antenna calibration page to reflect the new absolute antenna calibrations that are associated with IGS08, NAD 83(2011, MA11, PA11), namely the IGS08 absolute antenna calibrations, however to continue providing access to older reference frames the set of relative antenna calibrations is also still available. The absolute antenna calibrations may differ from corresponding relative calibrations up to several centimeters so users should ensure they are using the appropriate set of calibration values associated with the particular reference frame that they are working in."
SHG
Well, here is a pleasant discovery, LGO Version 7 (and I assume Ver 8) will ALREADY read the new ANTEX format with the IGS08 absolute antenna calibrations just dandy! Only problem I see is keeping straight which one a user picks, as those have the same names, although LGO will add a suffix to identically named antennas, just going to have to pay attention.
On the LEIAX1202GG NONE antennas that I use, the L1 PC is 22 mm different than the old relative calibration so one does need to pay attention. Let the screw ups begin 🙂
SHG
Javad Triumph-1's have different offsets as well. Just a heads up
thanks for the news, building new antenna file etc. today
if you are accumulating unwanted hair in unsightly places, get it "relased". ha-ho. sorry, shelby, had to say it.:beer:
anyway, warning to those that are rebuilding your boiler plate project settings; user friendly cors does not yet include the appropriate reference frame coordinates for these stations. see below:
from ufcors pkzip download
"Source:/home/hvan/Release/checkout/pv_ret/pv_ret.c
Version 2.0 July 24, 2011
***ITRF 00***
DC WAAS 1 (ZDC1), VIRGINIA
Retrieved from NGS DataBase on 09/07/11 at 11:04:40.
_____________________________________________________________________________
| |
| Antenna Reference Point(ARP): DC WAAS 1 CORS ARP |
| ------------------------------------------------ |
| PID = DF9217 |
| |
| |
| ITRF00 POSITION (EPOCH 1997.0) |
| Computed in December, 2003 using 22 days of data. |
| X = 1069125.958 m latitude = 39 06 05.74307 N |
| Y = -4839598.629 m longitude = 077 32 33.87636 W |
| Z = 4001126.172 m ellipsoid height = 79.614 m |
| |
| ITRF00 VELOCITY |
| Predicted with HTDP_2.7 November 2003. |
| VX = -0.0164 m/yr northward = 0.0032 m/yr |
| VY = -0.0017 m/yr eastward = -0.0164 m/yr |
| VZ = 0.0026 m/yr upward = 0.0002 m/yr |
| |
| |
| NAD_83 (CORS96) POSITION (EPOCH 2002.0) |
| Transformed from ITRF00 (epoch 1997.0) position in Dec. 2003. |
| X = 1069126.500 m latitude = 39 06 05.71496 N |
| Y = -4839600.091 m longitude = 077 32 33.86748 W |
| Z = 4001126.309 m ellipsoid height = 80.899 m |
| |
| NAD_83 (CORS96) VELOCITY |
| Transformed from ITRF00 velocity in Dec. 2003. |
| VX = -0.0000 m/yr northward = 0.0000 m/yr |
| VY = 0.0000 m/yr eastward = 0.0000 m/yr |
| VZ = -0.0000 m/yr upward = 0.0000 m/yr |
|_____________________________________________________________________________|
| |
| L1 Phase Center of the current GPS antenna: DC WAAS 1 CORS L1 PC C |"""
from ngs.noaa.gov/cgi-cors/corsage_2.prl etc." ***IGS 08***
DC WAAS 1 (ZDC1), VIRGINIA
Created on 31Aug2011 at 09:38:56.
_____________________________________________________________________________
| |
| Antenna Reference Point(ARP): DC WAAS 1 CORS ARP |
| ------------------------------------------------ |
| PID = DF9217 |
| |
| |
| IGS08 POSITION (EPOCH 2005.0) |
| Computed in Aug 2011 using data through gpswk 1631. |
| X = 1069125.825 m latitude = 39 06 05.74436 N |
| Y = -4839598.645 m longitude = 077 32 33.88193 W |
| Z = 4001126.212 m ellipsoid height = 79.628 m |
| |
| IGS08 VELOCITY |
| Computed in Aug 2011 using data through gpswk 1631. |
| VX = -0.0154 m/yr northward = 0.0031 m/yr |
| VY = 0.0002 m/yr eastward = -0.0150 m/yr |
| VZ = 0.0011 m/yr upward = -0.0020 m/yr |
| |
| |
| NAD_83 (2011) POSITION (EPOCH 2010.0) |
| Transformed from IGS08 (epoch 2005.0) position in Aug 2011. |
| X = 1069126.504 m latitude = 39 06 05.71467 N |
| Y = -4839600.094 m longitude = 077 32 33.86735 W |
| Z = 4001126.301 m ellipsoid height = 80.896 m |
| |
| NAD_83 (2011) VELOCITY |
| Transformed from IGS08 velocity in Aug 2011. |
| VX = 0.0012 m/yr northward = -0.0014 m/yr |
| VY = 0.0017 m/yr eastward = 0.0015 m/yr |
| VZ = -0.0030 m/yr upward = -0.0030 m/yr |
|_____________________________________________________________________________|
| |
| L1 Phase Center of the current GPS antenna: DC WAAS 1 CORS L1 PC C |
| ------------------------------------------------------------------ |"""
NAD 83(2011) Epoch 2010.00 Released Today
I hate it when I make a spelling error in the title of a thread, no way to edit on the top so we have to live with it 🙁
I can fix it for this post though 🙂
SHG
Nothing wrong with getting relased when the need arises....
Nothing worse than getting all haired over!