TY  - CONF
AU  - Kretschmer, Erik
AU  - Friedl-Vallon, Felix
AU  - Gulde, Thomas
AU  - Höpfner, Michael
AU  - Johansson, Sören
AU  - Kleinert, Anne
AU  - Maucher, Guido
AU  - Neubert, Tom
AU  - Nordmeyer, Hans
AU  - Piesch, Christof
AU  - Preusse, Peter
AU  - Riese, Martin
AU  - Schardt, Georg
AU  - Schönfeld, Axel
AU  - Ungermann, Jörn
AU  - Wetzel, Gerald
TI  - Balloon-borne GLORIA hyperspectral Limb and Nadir imager in the LWIR
M1  - FZJ-2022-00789
PY  - 2021
AB  - The GLORIA-B (Gimballed Limb Observer for Radiance Imaging of the Atmosphere - Balloon) instrument is an adaptation of the very successful GLORIA-AB imaging Fourier transform spectrometer (iFTS) flown on the research aircrafts HALO and M55 Geophysica. The high spectral resolution in the LWIR (Long Wave Infrared) allows for the retrieval of temperature and of a broad range of atmospheric trace gases, with the goal to retrieve O<sub>3</sub>, H<sub>2</sub>O, HNO<sub>3</sub>, C<sub>2</sub>H<sub>6</sub>, C<sub>2</sub>H<sub>2</sub>, HCOOH, CCl<sub>4</sub>, PAN, ClONO<sub>2</sub>, CFC-11, CFC-12, SF<sub>6</sub>, OCS, NH<sub>3</sub>, HCN, BrONO<sub>2</sub>, HO<sub>2</sub>NO<sub>2</sub>, N<sub>2</sub>O<sub>5</sub> and NO<sub>2</sub>. The radiometric sensitivity of the Balloon instrument is further increased in comparison with the GLORIA-AB instrument by having two detector channels on the same focal plane array, while keeping the same concept of a cooled optical system. This system improvement was achieved with minimal adaptation of the existing optical system.</p><p>The high spatial and temporal resolution of the instrument is ensured by the imaging capability of the Fourier transform spectrometer while stabilizing the line-of-sight in elevation with the instrument and in azimuth with the balloon gondola. In a single measurement lasting 13 seconds, the atmosphere can be sounded from mid-troposphere up to flight altitude, typically 30 km, with a vertical resolution always better than 1 km for most retrieved species; a spatial resolution up to 0.3 km can be achieved in favourable conditions. Temperature retrieval precision between 0.1 and 0.2 K is expected. A spectral sampling up to 0.0625 cm<sup>-1</sup> can be achieved.</p><p>The first flight of GLORIA-B shall take place during the late-summer polar jet turn-around at Kiruna/ESRANGE. This flight is organised in the frame of the HEMERA project and was scheduled for summer 2020, but was ultimately postponed to summer 2021. Beyond qualification of the first balloon-borne iFTS, the scientific goals of the flight are, among others, the quantification of the stratospheric bromine budget and its diurnal evolution by measuring vertical profiles of BrONO<sub>2 </sub>in combination with BrO observations by the DOAS instrument of University Heidelberg on the same platform.</p>
T2  - EGU General Assembly
CY  - 19 Apr 2021 - 30 Apr 2021, Vienna (Austria)
Y2  - 19 Apr 2021 - 30 Apr 2021
M2  - Vienna, Austria
LB  - PUB:(DE-HGF)6
DO  - DOI:10.5194/egusphere-egu21-11674
UR  - https://juser.fz-juelich.de/record/905548
ER  -