***ITRF 00***
                               City of Modesto
                                 California
                                    CMOD
_____________________________________________________________________________ 
|                                                                            |
|         Antenna Reference Point(ARP):                                      |
|                                                                            |
| ITRF00 POSITION (EPOCH 1997.0)                                             |
| Computed by NGS using OPUS on 04/17/02 w/ 10 days of data 01/27-02/05/02   |
|     X =  -2604474.586 m     latitude    =  37 38 28.81483 N                |
|     Y =  -4334578.021 m     longitude   = 120 59 59.90747 W                |
|     Z =   3874014.642 m     ellipsoid height =   28.080   m                |
|                                                                            |
| ITRF00 VELOCITY                                                            |
| Predicted with HTDP                                                        |
|     VX = -0.01867 m/yr      northward = -0.00541 m/yr                      |
|     VY =  0.00678 m/yr      eastward  = -0.01949 m/yr                      |
|     VZ = -0.00389 m/yr      upward    =  0.00064 m/yr                      |
|                                                                            |
|                                                                            |
| NAD_83 POSITION (EPOCH 2002.0)                                             |
| Computed by NGS using OPUS on 04/17/02 w/ 10 days of data 01/27-02/05/02   |
|     X =  -2604474.023 m     latitude    =  37 38 28.79809 N                |
|     Y =  -4334579.255 m     longitude   = 120 59 59.86185 W                |
|     Z =   3874014.583 m     ellipsoid height =   28.652   m                |
|                                                                            |
| NAD_83 VELOCITY                                                            |
| Predicted with HTDP                                                        |
|     VX = -0.00220 m/yr      northward =  0.00863 m/yr                      |
|     VY =  0.00747 m/yr      eastward  = -0.00574 m/yr                      |
|     VZ =  0.00683 m/yr      upward    =  0.00000 m/yr                      |
|____________________________________________________________________________|
|                                                                            |
| L1 Phase Center of the current GPS antenna:                                |
|                                                                            |
| Trimble Micro Centered                                                     |
| (Antenna Code = TRM33429.20+GP L1/L2 Microcentered Compact Geodetic +GP)   |
|        The L2 phase center is 0.0028 m above the L1 phase center.          |
|                                                                            |
| ITRF00 POSITION (EPOCH 1997.0)                                             |
| Computed by NGS using OPUS on 04/17/02 w/ 10 days of data 01/27-02/05/02   |
|     X =  -2604474.616 m     latitude    =  37 38 28.81483 N                |
|     Y =  -4334578.070 m     longitude   = 120 59 59.90747 W                |
|     Z =   3874014.687 m     ellipsoid height =   28.153   m                |
|                                                                            |
| The ITRF00 VELOCITY of the L1 PC is the same as that for the ARP.          |
|                                                                            |
| NAD_83 POSITION (EPOCH 2002.0)                                             |
| Computed by NGS using OPUS on 04/17/02 w/ 10 days of data 01/27-02/05/02   |
|     X =  -2604474.053 m     latitude    =  37 38 28.79809 N                |
|     Y =  -4334579.305 m     longitude   = 120 59 59.86185 W                |
|     Z =   3874014.627 m     ellipsoid height =   28.725   m                |
|                                                                            |
| The NAD_83 VELOCITY of the L1 PC is the same as that for the ARP.          |
|____________________________________________________________________________|