===========================================================
 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 19:29:24 (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 10:29:00  2013-04-15 10:44:57   00:15:57     4.8
1       2013-04-15 10:48:59  2013-04-15 12:10:10   01:21:11     4.8
2       2013-04-15 14:14:10  2013-04-15 15:04:58   00:50:48     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      6.0mm      6.1mm      60.0mm  Pass
        HKOH - HKST   17.0       13.2        8.1        60.0    Pass
        HKST - HKSC    9.2        1.3        3.6        58.9    Pass
--------------------------------------------------------------------

2       HKOH - HKSC   12.2km     43.3mm      7.3mm      60.0mm  Pass
        HKOH - HKST   17.0       10.5        4.2        60.0    Pass
        HKST - HKSC    9.2       66.4        4.8        58.9    Fail ***
--------------------------------------------------------------------


Baseline Ambiguity Status and Quality
--------------------------------------------------------------------
No. From  To     Sess  Dist  GDOP 3DQly  Fix  IonoAct Frequency
--------------------------------------------------------------------
1   HKOH  AA02a     1   8.3   4.8   0.7  Yes  Auto    L1 + L2
2   HKSC  AA02a     1  10.8   4.8   0.6  Yes  Auto    L1 + L2
3   HKST  AA02a     1  10.4   4.8   0.8  Yes  Auto    L1 + L2
--------------------------------------------------------------------
4   HKOH  AA02a     2   8.3   4.4  19.0  No   Medium  Iono Free (L3) ***
5   HKSC  AA02a     2  10.8   4.4   1.6  Yes  Auto    L1 + L2
6   HKST  AA02a     2  10.4   4.4   3.0  Yes  Auto    L1 + L2
--------------------------------------------------------------------



Repeated Baseline Summary
--------------------------------------------------------------------
Sess  GDOP    Delta Lat    Delta Long   Delta Ht  Remarks
--------------------------------------------------------------------
HKOH - AA02a
1     4.8    4'24.59343"   1'03.76182"  -34.0511  ???
--------------------------------------------------------------------

HKSC - AA02a
1     4.8   -0'03.55203"   6'18.27319"  112.1555
2     4.4   -0'03.55208"   6'18.27189"  112.1476
--------------------------------------------------------------------
   Spread:        1.4mm        38.9mm             2 Baselines
Allowable:       84.9mm        84.9mm             L=10.827km

--------------------------------------------------------------------
HKST - AA02a
1     4.8   -4'26.70661"   3'43.27962" -126.3240
2     4.4   -4'26.70856"   3'43.27808" -126.3786
--------------------------------------------------------------------
   Spread:       58.3mm        46.1mm             2 Baselines
Allowable:       84.9mm        84.9mm             L=10.399km

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



Least Squares Network Adjustment - Residuals Report
--------------------------------------------------------------------
Baseline     Session        Input   Std Err  --Residual--  Allowable
                             (m)      (mm)     XYZ    ENH     ENH
--------------------------------------------------------------------
1    HKOH -     1    DX    -384.4860   6.5    -0.9    5.4  53.9 Pass
     AA02a           DY   -3592.3304  11.0   -11.0   -3.9  53.9 Pass
                     DZ    7518.1597   5.8    -8.2  -12.1
                     DV    8341.1865
--------------------------------------------------------------------
2    HKSC -     1    DX   -9934.4867   6.5    -1.8    1.6  60.0 Pass
     AA02a           DY   -4304.1924  11.0     0.2    3.9  60.0 Pass
                     DZ     -58.4759   5.8     4.6    2.6
                     DV   10826.9810
--------------------------------------------------------------------
3    HKSC -     2    DX   -9934.4502   6.5    34.7  -35.5  60.0 Pass
     AA02a           DY   -4304.1833  11.0     9.3    2.4  60.0 Pass
                     DZ     -58.4802   5.8     0.3   -5.2
                     DV   10826.9439
--------------------------------------------------------------------
4    HKST -     1    DX   -7058.5292   6.5   -13.2    5.6  60.0 Pass
     AA02a           DY     119.3047  11.0    15.7    4.1  60.0 Pass
                     DZ   -7635.3837   5.8    12.5   23.1
                     DV   10398.8534
--------------------------------------------------------------------
5    HKST -     2    DX   -7058.4777   6.5    38.3  -38.4  60.0 Pass
     AA02a           DY     119.2974  11.0     8.5  -55.7  60.0 Pass
                     DZ   -7635.4598   5.8   -63.5  -31.6
                     DV   10398.8742
--------------------------------------------------------------------



* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
*                                                                 *
*   Final Result - AA02a                                          *
*                                                                 *
*   WGS84 (ITRF96) Geodetic Coordinates                           *
*   -----------------------------------                           *
*   Latitude   =  22^ 19' 16.26734" N    Standard Error = 4.4mm   *
*   Longitude  = 114^ 14' 46.54960" E    Standard Error = 4.5mm   *
*   Ell Height = 132.3799m               Standard Error = 12.5mm  *
*                                                                 *
*   Hong Kong 1980 Grid Coordinates (By Two Step Transformation)  *
*   ------------------------------------------------------------  *
*   Northing = 820243.335m                                        *
*   Easting  = 843417.065m                                        *
*   Height   =    134.784m (for reference only)                   *
*                                                                 *
*   The station 'AA02a' is                                        *
*   - fixed by 5 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 12 (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       : Auto 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 19:32:59 (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