Timed:Imagers

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Imager Sites for TIMED

Imagers

Broadband and narrowband intensity imagers (IMINT) only get intensities, which are related to density. The all-sky imagers have a field-of-view of 180 degrees, from horizon to horizon. The lowest 20 degrees is thrown out since there is no wave information with such long path lengths. Only the middle approximately 400-500 km is used. Broadband [OH] imagers are sensitive to the peak [OH] airglow emission at around 87 km (83-90 km), while [O2] emission peaks around 93 km. Other narrowband filters can be sodium [Na] which peaks around 91 km, or the [O] green line, which peaks around 95-97 km.

All the intensity imagers will probably produce keograms constructed from a north-south and east-west slice from the middle of every image joined over the whole night. 512x512 images are taken about every 2 minutes. The keograms are a convenient way to view activities over the whole night. Imagers are the best way to see short period gravity waves. The images from these 4 locations will probably be combined for an entire Rocky Mountain region view. The official format for the intensity images is FITS format, with added keywords for documentation. The keograms may be converted to DB format, and some are available on other web sites as jpegs.

Narrowband temperature imagers (NIMTN) focus on a narrow part of the [OH] spectrum, and so can obtain temperatures, similar to the CCD Spectrophotometers or other optical instruments that focus on a narrow emission line or band. Presently, the narrowband [OH] temperature imagers give 1 value of the temperature per night, but hopefully higher time resolution temperatures will be available. The official TIMED temperature imager is the new Utah State University narrowband [OH] temperature imager which will be moved to Platteville when built, hopefully in March 2002. However, the Mesospheric Temperature Mapper (MTM) narrowband [OH] and [O2] temperature imager is presently in Maui, Hawaii for the MAUI-MALT campaign, and its data has been donated to the TIMED team by Mike Taylor. (Donated instruments are indicated by a '*'.)

Several groups are using imagers at 4 Rocky Mountain locations. Mike Taylor (mtaylor@cc.usu.edu) of Utah State University has an all-sky broadband [OH] and [O2] imager at Bear Lake. Stephen Mende (mende@ssl.berkeley.edu) of the University of California at Berkeley has an all-sky broadband [OH] imager west of Grand Junction. Lois Kieffaber (lkieffaber@whitworth.edu) of the Whitworth College has an all-sky broadband [OH] imager at Platteville that Bifford Williams (biffw@lamar.colostate.edu) of Colorado State University is running. Also at Platteville is another broadband imager belonging to Bifford Williams which uses a narrowband sodium fliter, which could be switched to an atomic oxygen green line filter and can be donated to TIMED. A third imager at Platteville is the new mesospheric temperature mapper from Utah State University that will be installed in March 2002. It has 2 narrowband [OH] and [O2] filters so it can calculate brightness (density) and temperature in a small field-of-view.

The final imager in the Rocky Mountain region is the all-sky broadband [OH] and [O2] imager at Socorro, New Mexico, run by Gary Swenson (swenson1@uiuc.edu) of the University of Illinois. Keogram slices in the E-W and N-S directions are taken from the raw images and are available at the web site as jpeg files at http://conrad.csl.uiuc.edu/Data. Click to 'Socorro' location and to 'All Sky Imager' istrument to see [OH] raw keograms for each night. There is also a Bomem Michelson Interferometer at Socorro, and Wayne Hocking provides winds with his MF radar. A

A final [OH] and [O2] temperature imager may come to Abastumani Astrophysical Observatory (AAO) in Tbilisi, Georgia at the end of the year, and its data will be dontated by Gocha Didebulidze (didebulidze@yahoo.com) for a comparison project with TIDI data with Julie Kafkalides (juliek@umich.edu). The AAO will also donate data from a scanning 6-channel photometer (SCPH) with calibrated brightness of OH M (8-3) ~87 km, [O] at 557.7 nm ~97 km, [O] at 630.0 nm ~240 km, O2 (0-1) ~94 km, and [Na] at 589.2 nm ~90 km for the TIDI project.

Site Lat Lon Type Kinst Contact

Maui, HI, USA

20.75 -156.24 NIMTN* 7191 M. Taylor
Socorro, NM, USA 34.07 -106.92 IMINT 7180 G. Swenson
Glade Park, CO, USA 38.99 -108.74 IMINT 7150 S. Mende
Platteville, CO, USA 40.13 -104.5 IMINT 7320 L. Kieffaber/B. Williams
Platteville, CO, USA 40.13 -104.5 IMINT* 7185 B. Williams
Platteville, CO, USA 40.13 -104.5 NIMTN 7193 M. Taylor

Abastumani Astrophysical Obs, Tbilisi, Georgia

41.8 42.8 SCPH* 4335 G. Didebulidze
Abastumani Astrophysical Obs, Tbilisi, Georgia 41.8 42.8 NIMTN* 7188 G. Didebulidze
Bear Lake, UT, USA 41.933 -111.417 IMINT 7190 M. Taylor

--Revised 05 Oct 2004 by emery@ucar.edu