Calibration Sites

Little Rissington - September 2008 onwards

The survey site is at Little Rissington – an old MoD airfield and business park. For the survey, a GPS base station was set up in the grounds of the business park, specifically it was located south west of the first hangar when you enter the business park. The hangar is in use as the premises of a removal firm. This base station site is marked as B on Figure 1. It was collecting data for approximately 9 hours. Whilst the base station was in position collecting data, 64 additional points were surveyed; 63 of which were on the airfield and 1 on the business park. Each point was surveyed using GPS for 5 minutes. The points were surveyed for use as LIDAR, hyperspectral and camera control points, although not all points are suitable for every sensor. Photographs were taken of all the survey points by both Sterling Surveys and ARSF

See the attached documents for details.

The attached little_riss_survey_Sep08.csv​ file contains the locations of ground control points surveyed at the site.

Note: Point 64 shown on the image is in the business park to the north of the airfield (top left corner of image).

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Monks Wood - pre September 2008

Centre for Ecology and Hydrology Monks Wood site.

Approximate location:

• ETRS-89 (WGS-84) XYZ: 3899843.8284m, -16318.7154m, 5030129.9893m
  • Longitude: 0 degrees, 14 minutes, 13.56 seconds (52.474564)
  • Latitude: 52 degrees, 28 minutes, 28.43 seconds (0.237100)
• OS Grid (OSGB-36): 519857.522, 279414.596
  • Grid ref: TL 52040 88645

Please note: point 25 on the previous survey is the same point as point 7 on this survey. As point 7 is an average solution derived from four other points + a temporary base station the result above is a far better solution..

Note that point 7 is not shown on the image below. It actually occurs almost due north of target 6 beyond the Monks Wood buildings at the top right hand corner of the grass square that is actually just off the image. That is the 7th target of slabs used and recorded as the precise GPS points in the originally supplied coords.xls table.

GPS Locations of targets:

Point	ETRS 89 (WGS 84)			Pos Qlty	Hgt Qlty	Pos+Hgt Qlty	OS Grid (OSGB 36)
Id.	X	Y	Z	Quality	Quality	Quality	E	N	H
1	3899990.9122	-16767.0766	5030016.9027	0.0096	0.0146	0.0175	519414.561	279216.784	44.499
2	3899983.7474	-16573.9922	5030023.1466	0.0049	0.0063	0.0080	519607.267	279231.601	44.576
3	3899977.7336	-16320.1818	5030025.6952	0.0120	0.0178	0.0214	519860.745	279244.932	42.279
4	3899843.8284	-16318.7154	5030129.9893	0.0035	0.0069	0.0077	519857.522	279414.596	43.201
5	3899738.4140	-16316.4996	5030210.5789	0.0017	0.0020	0.0027	519856.068	279547.267	42.728
6	3899731.4446	-16091.6668	5030214.0582	0.0002	0.0005	0.0006	520080.550	279561.121	40.668
7 Not shown	3899489.7218	-16085.1161	5030392.4048	0.0040	0.0062	0.0074	520078.781	279861.452	34.480

See other attachments below for spreadsheets and vector files.