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Atmospheric Turbulence Statistics and Profile Modeling. Local to DLR Oberpfaffenhofen

Knoedler, Alexander und Moll, Florian (2021) Atmospheric Turbulence Statistics and Profile Modeling. Local to DLR Oberpfaffenhofen. COAT 2019 (Communications and Observations through Atmospheric Turbulence: characterization and mitigation), 02.-03. Dez. 2019, Châtillon, Frankreich. doi: 10.34693/COAT2019-S1-001.

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Offizielle URL: https://hal.archives-ouvertes.fr/hal-03206072

Kurzfassung

Laser communication (lasercom) is influenced by atmospheric turbulence, a quality measured by the refractive index structure parameter Cn². This paper quantifies the degree of improvement to lasercom link budgets afforded by using ground-level measurements of turbulence in vertical turbulence models. Ground-level Cn² is measured with an off-the-shelf scintillometer for a path adjacent to DLR's optical ground station (OGS). Measurements are in agreement with literature on turbulence; nighttime Cn² is well represented by a log-normal distribution. Comparisons are drawn between profiles by comparing link budget parameter estimates generated by four turbulence profile models: HV-5/7, HV with Cn²(h0), and HV and HAP models with Cn²(h0) and fitting to downlink experiment data. Vertical turbulence profiles are converted to scintillation index sigma²_I by way of theory described in the literature on weak and strong turbulence. Normalised root-mean-squared-error is used to establish goodness-of-fit of modeled sigma²_I to downlink beam parameter measurements . Use of Cn²(h0) in a profile model improves upon the fit beyond HV-5/7 by ~8.3%. Improvements in the mean expectation from specific fits to satellite downlink experiments improve the NRMSE 30%. However, the variability in margin estimation due to changes in Cn²(h0) indicates fitting might not be a consistent improvement over the HV-5/7 model. This paper describes the setup of the scintillometer, six months of measurements, the use of Cn²(h0) measurements in vertical profile models to find the path integrated intensity scintillation index (sigma²_I), and a comparison of modeled-path integrated scintillation index to the scintillation index of downlink ground measurements at DLR's OGS.

elib-URL des Eintrags:https://elib.dlr.de/143016/
Dokumentart:Konferenzbeitrag (Poster)
Titel:Atmospheric Turbulence Statistics and Profile Modeling. Local to DLR Oberpfaffenhofen
Autoren:
AutorenInstitution oder E-Mail-AdresseAutoren-ORCID-iDORCID Put Code
Knoedler, AlexanderDLR IKNNICHT SPEZIFIZIERTNICHT SPEZIFIZIERT
Moll, FlorianFlorian.Moll (at) dlr.deNICHT SPEZIFIZIERTNICHT SPEZIFIZIERT
Datum:2021
Referierte Publikation:Nein
Open Access:Ja
Gold Open Access:Nein
In SCOPUS:Nein
In ISI Web of Science:Nein
DOI:10.34693/COAT2019-S1-001
Status:veröffentlicht
Stichwörter:Refractive Index Structure Parameter, scintillation index, optical communication, downlink, Hufnagel-Valley Profile Modelling, optical ground station, KIODO
Veranstaltungstitel:COAT 2019 (Communications and Observations through Atmospheric Turbulence: characterization and mitigation)
Veranstaltungsort:Châtillon, Frankreich
Veranstaltungsart:internationale Konferenz
Veranstaltungsdatum:02.-03. Dez. 2019
Veranstalter :ONERA
HGF - Forschungsbereich:Luftfahrt, Raumfahrt und Verkehr
HGF - Programm:Raumfahrt
HGF - Programmthema:Kommunikation, Navigation, Quantentechnologien
DLR - Schwerpunkt:Raumfahrt
DLR - Forschungsgebiet:R KNQ - Kommunikation, Navigation, Quantentechnologie
DLR - Teilgebiet (Projekt, Vorhaben):R - Project PROSIRIS
Standort: Oberpfaffenhofen
Institute & Einrichtungen:Institut für Kommunikation und Navigation > Satellitennetze
Hinterlegt von: Moll, Florian
Hinterlegt am:09 Jul 2021 16:50
Letzte Änderung:09 Jul 2021 16:50

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