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A ground-based spectrometer equipped with an InGaAs array for routine observations of OH(3-1) rotational temperatures in the mesopause region

Schmidt, Carsten and Höppner, Kathrin and Bittner, Michael (2013) A ground-based spectrometer equipped with an InGaAs array for routine observations of OH(3-1) rotational temperatures in the mesopause region. Journal of Atmospheric and Solar-Terrestrial Physics (102), pp. 125-139. Elsevier. DOI: 10.1016/j.jastp.2013.05.001 ISSN 1364-6826

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Abstract

We present a new spectrometer with high temporal resolution for the observation of OH Meinel band emission dynamics in the spectral range between 1.5 µm and 1.6 µm. The instrument was developed and is now in operation at the German Remote Sensing Data Center (DFD) of the German Aerospace Center (DLR) in Oberpfaffenhofen (11.27E, 48.08N), Germany—a measurement station of the international Network for the Detection of Mesosphere Change (NDMC). It is equipped with a thermoelectrically cooled 512 element InGaAs-photodiode array (PDA) and a polychromator with a grating blazed for 1.6 µm. During routine operation one spectrum is obtained every 15 s, originating from a field of view of approximately 15 deg. x 15 deg. corresponding to 24x24 km2 in 87 km height, the peak height of the OH emission layer. The covered wavelength range allows the observation of the OH(3-1) Q- and P-branches as well as of the OH(4-2) R- and Q-branches. Rotational temperatures are calculated using OH(3-1) P-branch emissions between 1.52 µm and 1.55 µm. Being the successor of the older scanning grating spectrometers of the GRIPS type it is named Ground-based Infrared P-branch Spectrometer (GRIPS 6). A fully automated data acquisition and analysis scheme has also been developed, that covers the complete processing chain from data recording to derivation of rotational temperatures and to long-term archiving. For the estimation of a nocturnal mean value all samples of the nightly temperature time series are weighted according to their individual precision. Thus, mean temperatures between 1 and 2 K are lower compared to the unweighted arithmetic mean. Data products are archived at the World Data Center for Remote Sensing of the Atmosphere (WDC-RSAT) and results are displayed at the website of the Network for the Detection of Mesosphere Change (NDMC). A summary of the data obtained during the first 40 months of operation at the German Remote Sensing Data Center as well as aspects of data processing efforts are presented.

Item URL in elib:https://elib.dlr.de/83342/
Document Type:Article
Additional Information:weitere Informationen unter: http://wdc.dlr.de/ndmc
Title:A ground-based spectrometer equipped with an InGaAs array for routine observations of OH(3-1) rotational temperatures in the mesopause region
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Schmidt, Carstencarsten.schmidt (at) dlr.deUNSPECIFIED
Höppner, Kathrinkathrin.hoeppner (at) dlr.deUNSPECIFIED
Bittner, Michaelmichael.bittner (at) dlr.deUNSPECIFIED
Date:14 May 2013
Journal or Publication Title:Journal of Atmospheric and Solar-Terrestrial Physics
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
DOI :10.1016/j.jastp.2013.05.001
Page Range:pp. 125-139
Publisher:Elsevier
ISSN:1364-6826
Status:Published
Keywords:airglow, MLT region, instrumentation, NDMC
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Earth Observation
DLR - Research area:Raumfahrt
DLR - Program:R EO - Erdbeobachtung
DLR - Research theme (Project):R - Vorhaben Atmosphären- und Klimaforschung
Location: Oberpfaffenhofen
Institutes and Institutions:German Remote Sensing Data Center > Atmosphere
Deposited By: Schmidt, Carsten
Deposited On:23 Jul 2013 12:57
Last Modified:23 Jul 2013 12:57

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