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Calibration

Instrument: Rosamond Calibration Array

Rosamond Trihedral A typical Rosamond trihedral corner reflector.

The Rosamond Corner Reflector Array (RCRA) is located near the south beach of Rosamond Dry Lake Bed, California, USA. The array consists of twenty-three 2.4-meter trihedral corner reflectors (CRs), five 4.8-meter trihedral CRs, and four 0.7-meter trihedral CRs. The 2.4 and 4.8 CRs are in a 91-degree line with respect to each other. The 0.7-meter CRs are in an 80-degree line with respect to each other. Additionally all of the 4.8 CRs and 0.7 CRs look east with an azimuth heading of 350 degrees. Ten of the 2.4 CRs also look east and the remaining thirteen of the 2.4 CRs look west with an azimuth heading of 170 degrees.

The 2.4-meter CRs are constructed with Aluminum Alloy 3003 H14 aluminum perforated sheets with staggered round holes of size 0.09375" (2.4 mms). The 4.8-meter CRs are also constructed with Aluminum Alloy 3003 H14 but with larger 0.5" (12.7 mms) round holes, and 48% open surface area. The larger holes in the 4.8-meter CRs allow for lower weight but still compatibility with L-band wavelength. The 0.7-meter CRs have no holes.

The coordinates listed here are in IGb08. Please view a chronology of reference frames here. The coordinates are expressed as WGS-84 geodetic latitude and height above the reference ellipsoid such that:

a = 6378137 meters
f = 1/298.257222

Furthermore the coordinates are referenced to epoch 1-Jul-2011 and modeled with approximately 2.4 cms/year of plate motion with an azimuth direction of 283 degrees. Specifically the change in East, North, and Vertical is modeled as:

delta_east_in_meters = -0.023491 * ( gps_time_past_1-jul-2011_in_secs) / 365.25/ 86400
delta_north_in_meters = 0.005248 * ( gps_time_past_1-jul-2011_in_secs) / 365.25/ 86400
delta_vertical_in_meters = -0.000670 * ( gps_time_past_1-jul-2011_in_secs) / 365.25/ 86400

These rates are from the multi-year time series analysis of the permanent GPS monument located in Rosamond, CA. Please find further information here.

Image of corner reflectors in a line
L-band image of 350° heading corner reflectors

As of November 4, 2015, the location of the bottom vertex of CRs 04 through 12 and CRs 15 through 27 have been surveyed to an accuracy of 2 cms RMS. Several CRs on the west end of the array, specifically CRs numbers 00, 01, 02, 03,13, and 14 have yet to be surveyed to this accuracy and are believed to be known to around 10 cms RMS.

Due to excessive erosion in the lakebed, CRs number 16 and 05 were moved in 2014. CR16 was moved September 4, 2014 approximately 6.8 meters east of its old location and CR05 was moved November 4, 2014 approximation

Ronald Muellerschoen
Jet Propulsion Laboratory
Mail Stop 300-238
4800 Oak Grove Drive
Pasadena, California, 91109-8099

Tel: (818) 354-0717
Fax: (818) 393-6440
Email: rjm@jpl.nasa.gov

Corner Reflectors (CR)

CSV file of all CRs
KML file of all CRs

CR00 / Geodetic latitude: 34.79696800° / Longitude: -118.09652590° / Elevation: 660.9047 m

Orientation: 171.83°
Elevation angle: 11.43°
Side length: 2.4384 m




CR01 / Geodetic latitude: 34.79976241° / Longitude: -118.08704729° / Elevation: 661.0851 m

Orientation: 170.67°
Elevation angle: 11.68°
Side length: 2.4384 m




CR02 / Geodetic latitude: 34.80523651° / Longitude: -118.08745633° / Elevation: 660.8863 m

Orientation: 170.67°
Elevation angle: 12.34°
Side length: 2.4384 m




CR03 / Geodetic latitude: 34.80534159° / Longitude: -118.08190647° / Elevation: 661.0639 m

Orientation: 175.33°
Elevation angle: 11.89°
Side length: 2.4384 m




CR04 / Geodetic latitude: 34.8054146200° / Longitude: -118.0763748600° / Elevation: 661.1430 m

Orientation: 175.00°
Elevation angle: 12.38°
Side length: 2.4384 m




CR05 / Geodetic latitude: 34.8054928900° / Longitude: -118.0708001100° / Elevation: 661.2326 m

Orientation: 171.33°
Elevation angle: 10.10°
Side length: 2.4384 m




CR06 / Geodetic latitude: 34.8055839535° / Longitude: -118.0652228033° / Elevation: 661.2451 m

Orientation: 172.00°
Elevation angle: 10.76°
Side length: 2.4384 m




CR07 / Geodetic latitude: 34.8056690847° / Longitude: -118.0596637757° / Elevation: 661.3144 m

Orientation: 173.00°
Elevation angle: 11.59°
Side length: 2.4384 m




CR08 / Geodetic latitude: 34.8057512409° / Longitude: -118.0540701162° / Elevation: 661.4592 m

Orientation: 171.66°
Elevation angle: 10.21°
Side length: 2.4384 m




CR09 / Geodetic latitude: 34.8058133134° / Longitude: -118.0489122685° / Elevation: 661.4532 m

Orientation: 174.67°
Elevation angle: 8.45°
Side length: 2.4384 m




CR10 / Geodetic latitude: 34.8059246399° / Longitude: -118.0433640490° / Elevation: 661.5220 m

Orientation: 173.33°
Elevation angle: 7.96°
Side length: 2.4384 m




CR11 / Geodetic latitude: 34.8060233650° / Longitude: -118.0376900977° / Elevation: 661.6029 m

Orientation: 170.00°
Elevation angle: 8.19°
Side length: 2.4384 m




CR12 / Geodetic latitude: 34.8060461600° / Longitude: -118.0322784241° / Elevation: 661.9067 m

Orientation: 173.33°
Elevation angle: 11.84°
Side length: 2.4384 m




CR13 / Geodetic latitude: 34.80519087° / Longitude: -118.08441574° / Elevation: 660.8183 m

Orientation: 349.0°
Elevation angle: 13.86814°
Side length: 2.4384 m




CR14 / Geodetic latitude: 34.80543974° / Longitude: -118.07891211° / Elevation: 660.9549 m

Orientation: 350.0°
Elevation angle: 9.047237°
Side length: 2.4384 m




CR15 / Geodetic latitude: 34.8055180882° / Longitude: -118.0733393632° / Elevation: 661.2359 m

Orientation: 350.75°
Elevation angle: 7.35°
Side length: 2.4384 m




CR16 / Geodetic latitude: 34.8055478309° / Longitude: -118.0678661132° / Elevation: 661.2917 m

Orientation: 350.83°
Elevation angle: 6.90°
Side length: 2.4384 m




CR17 / Geodetic latitude: 34.8055009602° / Longitude: -118.0624549301° / Elevation: 661.3198 m

Orientation: 351.67°
Elevation angle: 11.00°
Side length: 2.4384 m




CR18 / Geodetic latitude: 34.8056857096° / Longitude: -118.0563895528° / Elevation: 661.3912 m

Orientation: 351.67°
Elevation angle: 11.23°
Side length: 2.4384 m




CR19 / Geodetic latitude: 34.8057217876° / Longitude: -118.0518132466° / Elevation: 661.4171 m

Orientation: 351.00°
Elevation angle: 11.56°
Side length: 2.4384 m




CR20 / Geodetic latitude: 34.8058372276° / Longitude: -118.0463549468° / Elevation: 661.4538 m

Orientation: 350.00°
Elevation angle: 10.61°
Side length: 2.4384 m


CR21 / Geodetic latitude: 34.8059004966° / Longitude: -118.0403309603° / Elevation: 661.4691 m

Orientation: 355.00°
Elevation angle: 9.95°
Side length: 2.4384 m


CR22 / Geodetic latitude: 34.8060308679° / Longitude: -118.0350619469° / Elevation: 661.7198 m

Orientation: 354.00°
Elevation angle: 10.59°
Side length: 2.4384 m


CR23 / Geodetic latitude: 34.8025039148° / Longitude: -118.0858021123° / Elevation: 661.2242 m

Orientation: 350.93°
Elevation angle: 21.75°
Side length: 4.8000 m




CR24 / Geodetic latitude: 34.8029086306° / Longitude: -118.0766439075° / Elevation: 661.4462 m

Orientation: 350.77°
Elevation angle: 22.15°
Side length: 4.8000 m


CR25 / Geodetic latitude: 34.8031558432° / Longitude: -118.0687772416° / Elevation: 661.5239 m

Orientation: 349.38°
Elevation angle: 21.23°
Side length: 4.8000 m




CR26 / Geodetic latitude: 34.8032277745° / Longitude: -118.0605799746° / Elevation: 661.6443 m

Orientation: 350.70°
Elevation angle: 22.00°
Side length: 4.8000 m


CR27 / Geodetic latitude: 34.8035191418° / Longitude: -118.0522777611° / Elevation: 661.6858 m

Orientation: 350.22°
Elevation angle: 22.00°
Side length: 4.8000 m


CR28 (Key) / Geodetic latitude: 34.7989403271° / Longitude: -118.0948045931° / Elevation: 661.5012 m

Orientation: 353.50°
Elevation angle: 12.30°
Side length: 0.7000 m




CR31 (Hello Kitty) / Geodetic latitude: 34.8012224301° / Longitude: -118.0790931019° / Elevation: 661.8806 m

Orientation: 351.00°
Elevation angle: 16.90°
Side length: 0.7000 m




CR34 (Kite) / Geodetic latitude: 34.8034953252° / Longitude: -118.0633906313° / Elevation: 661.9856 m

Orientation: 354.00°
Elevation angle: 22.40°
Side length: 0.7000 m


CR37 (Kangaroo) / Geodetic latitude: 34.8057786884° / Longitude: -118.0476720632° / Elevation: 662.1196 m

Orientation: 350.00°
Elevation angle: 28.40°
Side length: 0.7000 m