===========================================================
 Hong Kong Satellite Positioning Reference Station Network
             GNSS Automatic Computation Service
===========================================================

Applicant: Tai Man CHAN <ChanTai-man@hotmail.com>

Request: 2013-06-24 19:11:23 (HKT)
Process: 2013-06-24 19:25:08 (HKT)

New Station Name: AA02a

Computation Accuracy: 10mm + 3ppm

Upload files: 1. AA021050.13o   1361Kb  AA02a  1.754m
              2. BA021050.13o    516Kb  aa02b  1.700m


Reference Station
----------------------------------------------------------------
No.  Station      Latitude (N)      Longitude (E)     Ell.Height
----------------------------------------------------------------
1     HKOH     22^ 14' 51.67380"  114^ 13' 42.78789"   166.418m
2     HKST     22^ 23' 42.97409"  114^ 11' 03.27018"   258.727m
3     HKSC     22^ 19' 19.81950"  114^ 08' 28.27647"    20.227m
----------------------------------------------------------------


Observation Session
-----------------------------------------------------------------
Sess     Start(HKT)         End(HKT)      Duration      Lapse
-----------------------------------------------------------------
1    2013-04-15 10:21  2013-04-15 12:10  01:49(Pass)
2    2013-04-15 14:14  2013-04-15 15:25  01:11(Pass)  02:04(Pass)
-----------------------------------------------------------------


Windowing to Reject Epochs of GDOP > 5
--------------------------------------------------------------------
Session    Include From              To (HKT)      Duration  MaxGDOP
--------------------------------------------------------------------
1       2013-04-15 10:21:15  2013-04-15 10:44:57   00:23:42     4.8
1       2013-04-15 10:48:59  2013-04-15 12:10:10   01:21:11     4.8
2       2013-04-15 14:14:05  2013-04-15 15:04:58   00:50:53     4.4
2       2013-04-15 15:11:00  2013-04-15 15:19:58   00:08:58     4.4
--------------------------------------------------------------------




Checking Origin - Misclosure Summary
--------------------------------------------------------------------
Session   Origin      Length   Latitude   Longitude   Allowable
--------------------------------------------------------------------
1       HKOH - HKSC   12.2km      3.5mm      8.1mm      60.0mm  Pass
        HKOH - HKST   17.0       13.2        8.1        60.0    Pass
        HKST - HKSC    9.2        9.7        0.1        58.9    Pass
--------------------------------------------------------------------

2       HKOH - HKSC   12.2km      1.2mm      7.2mm      60.0mm  Pass
        HKOH - HKST   17.0       10.5        4.2        60.0    Pass
        HKST - HKSC    9.2       48.8        5.8        58.9    Pass
--------------------------------------------------------------------


Baseline Ambiguity Status and Quality
--------------------------------------------------------------------
No. From  To     Sess  Dist  GDOP 3DQly  Fix  IonoAct Frequency
--------------------------------------------------------------------
1   HKOH  AA02a     1   8.3   4.8   1.5  Yes  Auto    Iono Free (L3)
2   HKSC  AA02a     1  10.8   4.8   1.7  Yes  Auto    Iono Free (L3)
3   HKST  AA02a     1  10.4   4.8   1.9  Yes  Auto    Iono Free (L3)
--------------------------------------------------------------------
4   HKOH  AA02a     2   8.3   4.4  19.0  No   Medium  Iono Free (L3) ***
5   HKSC  AA02a     2  10.8   4.4   2.8  Yes  Auto    Iono Free (L3)
6   HKST  AA02a     2  10.4   4.4   7.0  Yes  Auto    Iono Free (L3)
--------------------------------------------------------------------



Repeated Baseline Summary
--------------------------------------------------------------------
Sess  GDOP    Delta Lat    Delta Long   Delta Ht  Remarks
--------------------------------------------------------------------
HKOH - AA02a
1     4.8    4'24.59377"   1'03.76178"  -34.0112  ???
--------------------------------------------------------------------

HKSC - AA02a
1     4.8   -0'03.55222"   6'18.27295"  112.1608
2     4.4   -0'03.55208"   6'18.27257"  112.1242
--------------------------------------------------------------------
   Spread:        4.1mm        11.4mm             2 Baselines
Allowable:       84.9mm        84.9mm             L=10.827km

--------------------------------------------------------------------
HKST - AA02a
1     4.8   -4'26.70688"   3'43.27917" -126.3344
2     4.4   -4'26.70886"   3'43.27750" -126.4565
--------------------------------------------------------------------
   Spread:       59.4mm        50.0mm             2 Baselines
Allowable:       84.9mm        84.9mm             L=10.399km

--------------------------------------------------------------------



Least Squares Network Adjustment - Residuals Report (Trial) [Show]

Least Squares Network Adjustment - Residuals Report (Final)
--------------------------------------------------------------------
Baseline     Session        Input   Std Err  --Residual--  Allowable
                             (m)      (mm)     XYZ    ENH     ENH
--------------------------------------------------------------------
1    HKST -     1    DX   -7058.5148   5.2     1.6   -3.1  60.0 Pass
     AA02a           DY     119.3041   8.5     4.0   -4.5  60.0 Pass
                     DZ   -7635.3951   4.4    -3.6    1.4
                     DV   10398.8520
--------------------------------------------------------------------
2    HKOH -     1    DX    -384.4985   5.2   -13.0    8.4  53.9 Pass
     AA02a           DY   -3592.3000   8.5     8.3    6.2  53.9 Pass
                     DZ    7518.1847   4.4    12.0   16.5
                     DV    8341.1965
--------------------------------------------------------------------
3    HKSC -     1    DX   -9934.4834   5.2     2.0   -1.1  60.0 Pass
     AA02a           DY   -4304.1831   8.5    -1.6   -2.4  60.0 Pass
                     DZ     -58.4791   4.4    -3.5   -3.4
                     DV   10826.9743
--------------------------------------------------------------------
4    HKSC -     2    DX   -9934.4589   5.2    26.4  -12.0  60.0 Pass
     AA02a           DY   -4304.2110   8.5   -29.5    1.8  60.0 Pass
                     DZ     -58.4891   4.4   -13.5  -40.0
                     DV   10826.9630
--------------------------------------------------------------------



* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
*                                                                 *
*   Final Result - AA02a                                          *
*                                                                 *
*   WGS84 (ITRF96) Geodetic Coordinates                           *
*   -----------------------------------                           *
*   Latitude   =  22^ 19' 16.26736" N    Standard Error = 3.4mm   *
*   Longitude  = 114^ 14' 46.54946" E    Standard Error = 3.6mm   *
*   Ell Height = 132.3912m               Standard Error = 9.7mm   *
*                                                                 *
*   Hong Kong 1980 Grid Coordinates (By Two Step Transformation)  *
*   ------------------------------------------------------------  *
*   Northing = 820243.336m                                        *
*   Easting  = 843417.061m                                        *
*   Height   =    134.796m (for reference only)                   *
*                                                                 *
*   The station 'AA02a' is                                        *
*   - fixed by 4 independent GPS baselines          (at least 3)  *
*   - connected to 3 SatRef GPS stations            (at least 2)  *
*   - obtained from 2 observation sessions          (at least 2)  *
*   - computed by following baselines (sessions)                  *
*     ~ HKOH 1-  (8.3km)                                          *
*     ~ HKSC 12 (10.8km)                                          *
*     ~ HKST 1- (10.4km)                                          *
*                                                                 *
*   Computation Accuracy     : 10mm + 3ppm                        *
*   Maximum Standard Error   : 30mm                               *
*   Minimum Session Duration : 15 minutes                         *
*   Minimum Session Lapse    : 30 minutes                         *
*   Elevation Mask           : 15 degrees                         *
*   Reject GDOP Exceed       : 5                                  *
*   Frequency Strategy       : L3 Preference                      *
*                                                                 *
*   This automatic computation result is for reference purpose    *
*   only.  Different survey purposes have different survey        *
*   specifications and requirements.  Lands Department gives no   *
*   guarantee regarding the correctness and completeness of this  *
*   automatic computation and shall not be liable for any loss    *
*   and damages arising from or related to the use of this        *
*   automatic computation result.  Please verify this automatic   *
*   computation result before use.                                *
*                                                                 *
* * 1.23.000735 * * * * * * * * * * * 2013-06-24 19:28:53 (HKT) * *



Remarks: Please click below links to get HTML result and full report.
         The link is valid until 2013-08-24.

Result.htm   FullReport.zip   LGOProject.zip