***ITRF2020***
                HALEAKALA OBSERVA (HAL1),  HAWAII

 Retrieved from NGS DataBase on 12/02/25 at 18:16:39.
 _____________________________________________________________________________ 
|                                                                             |
|         Antenna Reference Point(ARP): HALEAKALA OBSERVA CORS ARP            |
|         --------------------------------------------------------            |
|                             PID = DR4399                                    |
|                                                                             |
|                                                                             |
| ITRF2020 POSITION (EPOCH 2020.0)                                            |
| Computed in Dec 2025 using data through gpswk 2190.                         |
|     X =  -5466017.992 m     latitude    =  20 42 26.70338 N                 |
|     Y =  -2404394.540 m     longitude   = 156 15 22.47732 W                 |
|     Z =   2242210.313 m     ellipsoid height = 3072.863   m                 |
|                                                                             |
| ITRF2020 VELOCITY                                                           |
| Computed in Dec 2025 using data through gpswk 2190.                         |
|     VX =  -0.0129 m/yr      northward =   0.0346 m/yr                       |
|     VY =   0.0621 m/yr      eastward  =  -0.0620 m/yr                       |
|     VZ =   0.0320 m/yr      upward    =  -0.0010 m/yr                       |
|                                                                             |
|                                                                             |
| NAD_83 (PA11) POSITION (EPOCH 2010.0)                                       |
| Transformed from ITRF2020 (epoch 2020.0) position in Dec 2025.              |
|     X =  -5466016.952 m     latitude    =  20 42 26.65935 N                 |
|     Y =  -2404397.612 m     longitude   = 156 15 22.36572 W                 |
|     Z =   2242208.972 m     ellipsoid height = 3072.656   m                 |
|                                                                             |
| NAD_83 (PA11) VELOCITY                                                      |
| Transformed from ITRF2020 velocity in Dec 2025.                             |
|     VX =   0.0009 m/yr      northward =  -0.0003 m/yr                       |
|     VY =  -0.0003 m/yr      eastward  =   0.0006 m/yr                       |
|     VZ =  -0.0006 m/yr      upward    =  -0.0009 m/yr                       |
|_____________________________________________________________________________|
|                                                                             |
| L1 Phase Center of the current GPS antenna: HALEAKALA OBSERVA CORS L1PC     |
| --------------------------------------------------------------------------  |
| The External GPS L1/L2/L5, GLO L1/L2, GAL E1 antenna                        |
| (Antenna Code = JAVRINGANT_DM   SCIS) was installed on 11Feb2015.           |
|        The L2 phase center is 0.031 m above the L1 phase center.            |
|                             PID = DR4400                                    |
|                                                                             |
|                                                                             |
| ITRF2020 POSITION (EPOCH 2020.0)                                            |
| Computed in Dec 2025 using data through gpswk 2190.                         |
|     X =  -5466018.064 m     latitude    =  20 42 26.70339 N                 |
|     Y =  -2404394.574 m     longitude   = 156 15 22.47727 W                 |
|     Z =   2242210.344 m     ellipsoid height = 3072.949   m                 |
|                                                                             |
| The ITRF2020 VELOCITY of the L1 PC is the same as that for the ARP.         |
|                                                                             |
|                                                                             |
| NAD_83 (PA11) POSITION (EPOCH 2010.0)                                       |
| Transformed from ITRF2020 (epoch 2020.0) position in Dec 2025.              |
|     X =  -5466017.024 m     latitude    =  20 42 26.65936 N                 |
|     Y =  -2404397.646 m     longitude   = 156 15 22.36567 W                 |
|     Z =   2242209.003 m     ellipsoid height = 3072.742   m                 |
|                                                                             |
| The NAD_83 (PA11) VELOCITY of the L1 PC is the same as that for the ARP.    |
|_____________________________________________________________________________|
|                                                                             |
|         Monument: HALEAKALA OBSERVA CORS GRP                                |
|         ------------------------------------                                |
|                             PID = DR4401                                    |
|         Inscribed: UNKNOWN                                                  |
|                                                                             |
|                                                                             |
| ITRF2020 POSITION (EPOCH 2020.0)                                            |
| Computed in Dec 2025 using data through gpswk 2190.                         |
|     X =  -5466017.985 m     latitude    =  20 42 26.70338 N                 |
|     Y =  -2404394.537 m     longitude   = 156 15 22.47732 W                 |
|     Z =   2242210.310 m     ellipsoid height = 3072.855   m                 |
|                                                                             |
| The ITRF2020 VELOCITY of the monument is the same as that for the ARP.      |
|                                                                             |
|                                                                             |
| NAD_83 (PA11) POSITION (EPOCH 2010.0)                                       |
| Transformed from ITRF2020 (epoch 2020.0) position in Dec 2025.              |
|     X =  -5466016.944 m     latitude    =  20 42 26.65935 N                 |
|     Y =  -2404397.609 m     longitude   = 156 15 22.36572 W                 |
|     Z =   2242208.970 m     ellipsoid height = 3072.648   m                 |
|                                                                             |
| The NAD_83 (PA11) VELOCITY of the monument is the same as that for the ARP. |
|_____________________________________________________________________________|


 * Latitude, longitude and ellipsoid height are computed from their
   corresponding cartesian coordinates using dimensions for the
   GRS 80 ellipsoid: semi-major axis = 6,378,137.0 meters
                          flattening = 1/298.257222101...


 * WARNING: Mixing of antenna types can lead to errors of up to 10 cm.
   in height unless antenna-phase-center variation and antenna-phase-center
   offset are properly modeled.  See next comment.

 * The coordinates shown on this page were computed using absolute antenna
   calibrations.  CORS coordinates began using absolute antenna calibrations
   beginning with IGS08 and NAD 83 (2011, MA11, PA11).  For additional
   information on the derivation of these positions and velocities and
   antenna calibrations consult:
   https://geodesy.noaa.gov/CORS/index.shtml
   https://geodesy.noaa.gov/ANTCAL/


 * For more site specific information on the equipment history and
   monumentation type consult:
   https://geodesy.noaa.gov/corsdata/station_log/hal1.log.txt
   https://geodesy.noaa.gov/CORS/ncn_station_pages/index.html?stationID=hal1


 * The position & velocity were revised in Apr 2025.
 * The position & velocity were revised in Dec 2025.