The Southern Great Plains (SGP) atmospheric observatory was the first field measurement site established by the Atmospheric Radiation Measurement (ARM) user facility. This observatory is the world’s largest and most extensive climate research facility.

Scientists use data from the SGP to learn about cloud, aerosol, and atmospheric processes, which in turn leads to improvements in models of the Earth’s climate.

Note: A = Argonne Boundary Layer Experiment, B = Boundary Facility, C = Central Facility, E = External Facility, I = Intermediate Facility, L = Logistics Facility, N = Network Location, S = Supplemental Facility, X = External Data / Facility

Observatory Facility Locations at a Glance

Southern Great Plains

Facility Name Site Code Facility Code Elevation Lat/Lon Surface Type
Hillsboro, KS (Boundary)
(Removed: 2009-10-20)
SGP B1 447 m 38.305000 N
97.301000 W
(Google Map)
Grass
Vici, OK (Boundary)
(Removed: 2010-02-17)
SGP B4 622 m 36.071000 N
99.204000 W
(Google Map)
Grass
Morris, OK (Boundary)
(Removed: 2009-11-17)
SGP B5 217 m 35.688000 N
95.856000 W
(Google Map)
Grass
Purcell, OK (Boundary)
(Removed: 2010-01-13)
SGP B6 344 m 34.985000 N
97.522000 W
(Google Map)
Grass
Central Facility, Lamont, OK SGP C1 318 m 36.605000 N
97.485000 W
(Google Map)
Rangeland (Sandy)
Larned, KS (Extended)
(Removed: 2009-10-14)
SGP E1 632 m 38.202000 N
99.316000 W
(Google Map)
Wheat
Hillsboro, KS (Extended)
(Removed: 2009-10-20)
SGP E2 450 m 38.306000 N
97.301000 W
(Google Map)
Grass
LeRoy, KS (Extended)
(Removed: 2009-10-28)
SGP E3 338 m 38.201000 N
95.597000 W
(Google Map)
Wheat and soybeans (Rotated)
Plevna, KS (Extended)
(Removed: 2011-09-26)
SGP E4 513 m 37.953000 N
98.329000 W
(Google Map)
Rangeland (Ungrazed)
Halstead, KS (Extended)
(Removed: 2009-11-02)
SGP E5 440 m 38.114000 N
97.513000 W
(Google Map)
Wheat
Towanda, KS (Extended)
(Removed: 2011-10-18)
SGP E6 409 m 37.842000 N
97.020000 W
(Google Map)
Alfalfa
Elk Falls, KS (Extended)
(Removed: 2011-11-14)
SGP E7 283 m 37.383000 N
96.180000 W
(Google Map)
Pasture
Coldwater, KS (Extended)
(Removed: 2009-11-10)
SGP E8 664 m 37.333000 N
99.309000 W
(Google Map)
Rangeland (Grazed)
Ashton, KS (Extended) SGP E9 386 m 37.132002 N
97.266077 W
(Google Map)
Pasture
Tyro, KS (Extended)
(Removed: 2011-11-19)
SGP E10 248 m 37.068000 N
95.788000 W
(Google Map)
Alfalfa
Byron, OK (Extended) SGP E11 360 m 36.881345 N
98.286393 W
(Google Map)
Pasture
Pawhuska, OK (Extended) SGP E12 331 m 36.841409 N
96.428106 W
(Google Map)
Native Prairie
Lamont, OK (Extended and Co-located with C1) SGP E13 318 m 36.604937 N
97.485561 W
(Google Map)
Pasture and Wheat
Lamont, OK (Extended, secondary) SGP E14 315 m 36.607000 N
97.488000 W
(Google Map)
Pasture and Wheat
Ringwood, OK (Extended) SGP E15 418 m 36.430844 N
98.284348 W
(Google Map)
Pasture
Vici, OK (Extended)
(Removed: 2011-11-15)
SGP E16 602 m 36.061000 N
99.134000 W
(Google Map)
Wheat
Morris, OK (Extended)
(Removed: 2009-11-17)
SGP E18 217 m 35.687000 N
95.856000 W
(Google Map)
Pasture (Ungrazed)
El Reno, OK (Extended)
(Removed: 2011-09-23)
SGP E19 421 m 35.557000 N
98.017000 W
(Google Map)
Pasture (Ungrazed)
Meeker, OK (Extended)
(Removed: 2011-11-17)
SGP E20 309 m 35.564000 N
96.988000 W
(Google Map)
Pasture
Okmulgee, OK (Extended) SGP E21 240 m 35.618339 N
96.065558 W
(Google Map)
Forest
Cordell, OK (Extended)
(Removed: 2009-12-01)
SGP E22 465 m 35.354000 N
98.977000 W
(Google Map)
Rangeland (Grazed)
Cyril, OK (Extended)
(Removed: 2009-11-14)
SGP E24 409 m 34.883000 N
98.205000 W
(Google Map)
Wheat (Gypsum Hill)
Seminole, OK (Extended)
(Removed: 2002-04-09)
SGP E25 277 m 35.246000 N
96.736000 W
(Google Map)
Pasture
Cement, OK (Extended)
(Removed: 2009-12-17)
SGP E26 400 m 34.957000 N
98.076000 W
(Google Map)
Pasture
Earlsboro, OK (Extended)
(Removed: 2010-01-20)
SGP E27 300 m 35.269000 N
96.740000 W
(Google Map)
Pasture
Anthony, KS (Extended) SGP E31 412 m 37.150909 N
98.362022 W
(Google Map)
Pasture
Medford, OK (Extended) SGP E32 328 m 36.819270 N
97.819843 W
(Google Map)
Pasture
Newkirk, OK (Extended) SGP E33 357 m 36.925423 N
97.081708 W
(Google Map)
Cultivated field to south, site in grassy field
Maple City, KS (Extended) SGP E34 417 m 37.069563 N
96.760540 W
(Google Map)
Pasture
Tryon, OK (Extended) SGP E35 294 m 35.861614 N
97.069615 W
(Google Map)
Pasture
Marshall, OK (Extended) SGP E36 340 m 36.117032 N
97.510908 W
(Google Map)
Pasture
Waukomis, OK (Extended) SGP E37 379 m 36.310422 N
97.927405 W
(Google Map)
Cultivated field to south, site in grass
Omega, OK (Extended) SGP E38 367 m 35.879853 N
98.173045 W
(Google Map)
Cultivated field to south, site in pasture
Morrison, OK (Extended) SGP E39 279 m 36.373539 N
97.069053 W
(Google Map)
Cultivated field to south, site in pasture
Pawnee, OK (Extended) SGP E40 247 m 36.319367 N
96.762027 W
(Google Map)
Pasture
Peckham, OK (Extended) SGP E41 341 m 36.879561 N
97.086452 W
(Google Map)
Cultivated field to south, site in grassy field
Lamont, OK (Extended, Shipping) SGP E42 305 m 36.601350 N
97.481037 W
(Google Map)
Pasture
Lamont, OK (NW stereo camera site, Extended) SGP E43 311 m 36.637100 N
97.538200 W
(Google Map)
Pasture
Billings, OK (SE stereo camera site, Extended) SGP E44 310 m 36.637000 N
97.430200 W
(Google Map)
Pasture
Tonkawa, OK (NE stereo camera site, Extended) SGP E45 317 m 36.549900 N
97.479700 W
(Google Map)
Grass
Lamont, OK (Extended for testing)
(Removed: 1995-04-03)
SGP E99 Awaiting information
Southern Great Plains; Gulfstream 159 Aircraft SGP F1 215 m 36.753980 N
96.009010 W
(Google Map)
Awaiting information
Cessna 206 Aircraft SGP F2 303 m 36.727585 N
97.101580 W
(Google Map)
Awaiting information
Beaumont, KS (Intermediate) SGP I1 478 m 37.626000 N
96.538000 W
(Google Map)
Rangeland
Medicine Lodge, KS (Intermediate)
(Removed: 2008-09-09)
SGP I2 616 m 37.280000 N
98.933000 W
(Google Map)
Rangeland
Meeker, OK (Intermediate)
(Removed: 2009-02-17)
SGP I3 275 m 35.551000 N
96.864000 W
(Google Map)
Grass
Billings, OK (Intermediate) SGP I4 330 m 36.578650 N
97.363834 W
(Google Map)
Cultivated Field
Garber, OK (Intermediate) SGP I5 328 m 36.491178 N
97.593936 W
(Google Map)
Pasture
Deer Creek, OK (Intermediate) SGP I6 341 m 36.767569 N
97.547446 W
(Google Map)
Cultivated Field
Nardin, OK (C-band radar site, Intermediate / Auxiliary) SGP I7 327 m 36.796101 N
97.449012 W
(Google Map)
Cultivated Field
Tonkawa, OK (NE radar wind profiler site, Intermediate / Auxiliary) SGP I8 306 m 36.708631 N
97.386319 W
(Google Map)
Pasture
Billings, OK (SE radar wind profiler site, Intermediate / Auxiliary) SGP I9 291 m 36.477116 N
97.421082 W
(Google Map)
Pasture
Lamont, OK (NW radar wind profiler site, Intermediate / Auxiliary) SGP I10 312 m 36.665570 N
97.628475 W
(Google Map)
Pasture (Ungrazed)
Billings, OK (SE scanning X/Ka-band cloud radar site, Intermediate / Auxiliary) SGP I12 Pasture
Supplemental 1, Lamont, OK SGP S01 Pasture
Supplemental 2, Lamont, OK SGP S02 Pasture
Supplemental 3, Lamont, OK SGP S03 Pasture
Supplemental 4, Lamont, OK SGP S04 Pasture
Supplemental 5, Lamont, OK SGP S05 Pasture
Supplemental 6, Chickasha, OK SGP S06 Pasture
Supplemental 7, Lamont, OK SGP S07 Pasture
Supplemental 8, Lamont, OK SGP S08 Pasture
Blackwell/Tonkawa Airport, OK (Supplemental)
(Removed: 2000-03-23)
SGP S3 Pasture
ARM Aerial Facility (AAF) - Unmanned Aircraft Systems, ArcticShark
(Removed: 2019-04-17)
SGP U2 Awaiting information