@prefix ns0: . @prefix skos: . ns0:altLabel [ ] ; skos:definition """The Space Shuttle Discovery carrying UARS was launched on September 12, 1991 from Kennedy Space Flight Center. UARS was released to orbit on September 15, 1991, and the Improved Stratospheric and Mesospheric Sounder (ISAMS) began scientific observations of the earth's upper atmosphere September 26, 1991. ISAMS is a limb-sounding radiometer which uses a combination of pressure-modulated and wide-band infrared channels to measure Carbon Monoxide, Water Vapour, Nitrogen Dioxide, Nitric Acid, Ozone, Nitric Oxide, Nitrous Oxide, Methane, Dinitrogen Pentoxide, Aerosol, and Temperature in the middle atmosphere. Typically, ISAMS produces vertical profiles of constituents and temperature every 200 km along the tangent track, with an instantaneous field of view of about 2.4 km vertically. ISAMS made measurements, with several significant gaps, between 80 S and 80 N from 26 September 1991 to 29 July 1992. UARS is in a near sun-synchronous orbit so that while the 15 orbits/day are spaced approximately every 24 degrees of longitude around the equator, the sampled local solar time actually changes by 20 minutes/day. The ISAMS Primary Science Objectives: (1) To determine the thermal structure of the middle atmosphere and its fluctuations in space and time, (2) To investigate the photochemistry of nitrogen-containing species, (3) To study the water vapour budget, (4) To investigate the role of volcanic and polar stratospheric aerosol in stratospheric chemistry. Typically, over 2600 temperature profiles/day were retrieved, spaced every 200 km along the limb-viewing track and nominally extending from 100-0.01 mb (15-80 km). ISAMS Principal Investigator: Fred W. Taylor E-mail: taylor@isams.atm.ox.ac.uk References: Taylor, F. W., Scaddan, R. J. and Callard, L. Improved Stratospheric and Mesospheric Sounder. Optical Engineering, 810, pp. 81-90, 1988. Taylor, F. W., C. D. Rodgers, J. G. Whitney, S. T. Werrett, J. J. Barnett, G. D. Peskett, P. Venters, J. Ballard, C. W. P. Palmer, R. J. Knight, P. Morris, T. Nightingale, A. Dudhia, Remote Sensing of Atmospheric Structure and Composition by Pressure Modulator Radiometry from Space: The ISAMS Experiment on UARS, J. Geophys. Res., 98, p10, 799-10814, 1993 Taylor F. W., J. Ballard, A. Dudhia, M. Goss-Custard, B. J. Kerridge, A. Lambert, M. Lopez-Valverde, C. D. Rodgers and J. J. Remedios, Stratospheric and Mesospheric observations with ISAMS, Adv. in Space Res., 14, pp. (9)41-(9)52, 1994. Taylor F. W., A. Lambert, R. G. Grainger, C. D. Rodgers and J. J. Remedios, Properties of Northern Hemisphere Polar Stratospheric Clouds and Volcanic Aerosol in 1991/2 from UARS/ISAMS Satellite Measurements, J. Atmos. Sci., 51, pp3019-3026, 1994. Group: Instrument_Details Entry_ID: ISAMS Group: Instrument_Identification Instrument_Category: Earth Remote Sensing Instruments Instrument_Class: Passive Remote Sensing Instrument_Type: Profilers/Sounders Short_Name: ISAMS Long_Name: Improved Stratospheric And Mesospheric Sounder End_Group Group: Associated_Platforms Short_Name: UARS End_Group Online_Resource: http://badc.nerc.ac.uk/data/isams/ Online_Resource: http://disc.sci.gsfc.nasa.gov/UARS/documents/data-guides-for-uars-platform Creation_Date: 2016-01-08 Group: Instrument_Logistics Data_Rate: 1991-09-26 Instrument_Start_Date: 1992-07-29 Instrument_Owner: NASA End_Group End_Group"""@en ; skos:prefLabel "ISAMS"@en ; skos:inScheme ; skos:broader ; a skos:Concept . skos:prefLabel "Profilers/Sounders"@en ; a skos:Concept ; skos:narrower .