Determination of gravity wave parameters in the airglow combining photometer and imager data

Abstract

Abstract. Mesospheric airglow measurements of two or three layers were used to characterize both vertical and horizontal parameters of gravity waves. The data set was acquired coincidentally from a multi-channel filter (Multi-3) photometer and an all-sky imager located at São João do Cariri (7.4 • S, 36.5 • W) in the equatorial region from 2001 to 2007. Using a least-square fitting and wavelet analysis technique, the phase and amplitude of each observed wave were determined, as well as the amplitude growth. Using the dispersion relation of gravity waves, the vertical and horizontal wavelengths were estimated and compared to the horizontal wavelength obtained from the keogram analysis of the images observed by an all-sky imager. The results show that both horizontal and vertical wavelengths, obtained from the dispersion relation and keogram analysis, agree very well for the waves observed on the nights of 14 October and 18 December 2006. The determined parameters showed that the observed wave on the night of 18 December 2006 had a period of ∼ 43.8 ± 2.19 min, with the horizontal wavelength of 235.66 ± 11.78 km having a downward phase propagation, whereas that of 14 October 2006 propagated with a period of ∼ 36.00 ± 1.80 min with a horizontal wavelength of ∼ 195 ± 9.80 km, and with an upward phase propagation. The observation of a wave taken by a photometer and an allsky imager allowed us to conclude that the same wave could be observed by both instruments, permitting the investigation of the two-dimensional wave parameter.

Retrieval of intrinsic mesospheric gravity wave parameters using lidar and airglow temperature and meteor radar wind data

“…In summary, we demonstrated that our analysis is capable of determining the full set of GW parameters covering a wide range of values that are known to be typical for gravity waves. Typical values for λ h in airglow data are in the range of 10 -200 km (Nakamura et al, 2003;Diettrich et al, 2005;Matsuda et al, 2014;Lu et al, 2015;Nyassor et al, 2018). By 5 analysing keograms, Fritts et al (2014) retrieve even larger λ h with values reaching 4000 km.…”

“…To obtain intrinsic periods, OH imaging data is often combined with meteor radar observations of the ambient wind (e.g. Nyassor et al, 2018). Mangognia et al (2016) proposed a multi-channel instrument to deduce vertical wavelengths which must otherwise be determined from the dispersion relation or in combination with other observation techniques.…”

Determination of time-varying periodicities in unequally spaced time series of OH* temperatures using a moving Lomb–Scargle periodogram and a fast calculation of the false alarm probabilities

“…The mean altitude is about 87 km and the layer has a full width at half maximum (FWHM) of about 9 km (e.g. Baker and Stair Jr., 1998;Oberheide et al, 2006). Measurements are carried out every night, except for nights with bad weather conditions.…”

The OI‐135.6 nm Nighttime Emission in ICON‐FUV Images: A New Tool for the Observation of Classical Medium‐Scale Traveling Ionospheric Disturbances?

“…Since the 1960s, MSTIDs have been widely investigated with various ground‐based techniques like ionosondes (Reinisch et al, ), radars (Fukao et al, ; Kelley & Fukao, ), using total electron content (TEC) derived from Global Navigation Satellite Systems (GNSS) measurements (Figueiredo et al, ; Hernández‐Pajares et al, ) or with all‐sky airglow imagers (Martinis et al, ; Nyassor et al, ; Otsuka et al, , ). If in situ observation of MSTIDs are widely reported, for instance, with plasma probes onboard C/NOFS (Burke et al, ) or CHAMP and DMSP‐F15 spacecrafts (Nishioka et al, ), remote sensing of MSTIDs based on airglow observations from space are, however, much less numerous.…”

“…Periodicity of such waves ranges between several hours for the main tides up to about 30 days for planetary waves. To these recurrent patterns are superimposed numerous types of disturbances which constitute the short-term Since the 1960s, MSTIDs have been widely investigated with various ground-based techniques like ionosondes (Reinisch et al, 2018), radars , using total electron content (TEC) derived from Global Navigation Satellite Systems (GNSS) measurements (Figueiredo et al, 2018;Hernández-Pajares et al, 2012) or with all-sky airglow imagers (Martinis et al, 2018;Nyassor et al, 2018;Otsuka et al, 2004Otsuka et al, , 2013. If in situ observation of MSTIDs are widely reported, for instance, with plasma probes onboard C/NOFS (Burke et al, 2016) or CHAMP and DMSP-F15 spacecrafts (Nishioka et al, 2009), remote sensing of MSTIDs based on airglow observations from space are, however, much less numerous.…”