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Journal Article
ACCEPTED MANUSCRIPT
Geometric Mean Algebraic Reconstruction Technique : A tool for ionospheric tomography using GNSS receiver system
RAS Techniques and Instruments, rzaf015, https://doi.org/10.1093/rasti/rzaf015
Published: 02 May 2025
Journal Article
ACCEPTED MANUSCRIPT
Methods for robustly measuring the minimum spanning tree and other field level statistics from galaxy surveys
RAS Techniques and Instruments, rzaf014, https://doi.org/10.1093/rasti/rzaf014
Published: 28 April 2025
Journal Article
ACCEPTED MANUSCRIPT
Analysis of the accuracy of GNSS inferred precipitable water vapour against that from a 210 GHz WVR at the H.E.S.S. site
RAS Techniques and Instruments, rzaf012, https://doi.org/10.1093/rasti/rzaf012
Published: 23 April 2025
Journal Article
ACCEPTED MANUSCRIPT
Photon Interval Statistics Measure Rapid Variability
RAS Techniques and Instruments, rzaf013, https://doi.org/10.1093/rasti/rzaf013
Published: 23 April 2025
Image
Left panel: The total Cumulative mass distribution index for all meteors ob...
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Retrieval of mesospheric temperature from meteor radar and comparison with TIMED/SABER observation
Published: 17 April 2025
Figure 2.
Left panel: The total Cumulative mass distribution index for all meteors observed between 2010 and 2020 in the selected elevations. The black dots represents the cumulative number N for each echo amplitude (in digital units), the red curve is the histogram showing the distribution of , and the
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Optimization of the forward model (black) using the average SABER data (Yea...
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Retrieval of mesospheric temperature from meteor radar and comparison with TIMED/SABER observation
Published: 17 April 2025
Figure 5.
Optimization of the forward model (black) using the average SABER data (Year: 2010–2017). The MSIS model atmosphere, as a function of day of the year (DoY), is given as the ‘starting guess’ to initialize the LM algorithm.
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The top-left panel shows the distribution of the estimated values of the co...
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Retrieval of mesospheric temperature from meteor radar and comparison with TIMED/SABER observation
Published: 17 April 2025
Figure 7.
The top-left panel shows the distribution of the estimated values of the constant, . The mean and the standard deviation of this distribution is defined as the slope of the central trend line in top-right panel, hence showing the inverse relation between the width of height distribution (in units
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Seasonal variation in mean velocity and height in the composite data (all y...
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Retrieval of mesospheric temperature from meteor radar and comparison with TIMED/SABER observation
Published: 17 April 2025
Figure 8.
Seasonal variation in mean velocity and height in the composite data (all years combined). The vertical dashed lines mark: 15 Jan, 23 April (Lyrids peak), 25 July, and 1st October, from left-to-right respectively.
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The temperatures (black) for the year 2010 (panel a) and the difference fro...
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Retrieval of mesospheric temperature from meteor radar and comparison with TIMED/SABER observation
Published: 17 April 2025
Figure 10.
The temperatures (black) for the year 2010 (panel a) and the difference from the reference level (panel b) The vertical dashed lines (from left to right) correspond to the dates 15th and 24th January. The grey shade is error in the temperature and same as in Fig. 9(c) . For comparison, the red
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Panels in top two rows show the temperature difference (from the reference ...
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Retrieval of mesospheric temperature from meteor radar and comparison with TIMED/SABER observation
Published: 17 April 2025
Figure 11.
Panels in top two rows show the temperature difference (from the reference temperature) measured under the assumption of constant mass index (red) versus variable mass index (black) for selected years. The bottom panel is the average difference of all years. The dashed vertical lines mark 15 January
Journal Article
Retrieval of mesospheric temperature from meteor radar and comparison with TIMED/SABER observation
RAS Techniques and Instruments, Volume 4, 2025, rzaf011, https://doi.org/10.1093/rasti/rzaf011
Published: 17 April 2025
Image
Top-left panel compares the MR temperature (black) with SABER (red) for the...
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Retrieval of mesospheric temperature from meteor radar and comparison with TIMED/SABER observation
Published: 17 April 2025
Figure 9.
Top-left panel compares the MR temperature (black) with SABER (red) for the years 2010–2017. Seasonal variation in precision (random errors) expressed as percentage of average MR temperature for a given date is shown in panel (c). The difference (relative to MR temperature in per cent) of the MR and
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Panel (a) shows the height-log distribution for an example date (25 July...
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Retrieval of mesospheric temperature from meteor radar and comparison with TIMED/SABER observation
Published: 17 April 2025
Figure 1.
Panel (a) shows the height-log distribution for an example date (25 July) after applying the cleaning criteria (see the text). The scale height, , is adopted from MSIS model atmosphere. The contours are showing the number of detections relative to that of the peak height ( km) and the gradi
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Top two panels show the seasonal variation in meteor rate and the peak heig...
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Retrieval of mesospheric temperature from meteor radar and comparison with TIMED/SABER observation
Published: 17 April 2025
Figure 3.
Top two panels show the seasonal variation in meteor rate and the peak heights in the selected data (see Section 2 ) for different years. The black lines are the daily mean (reference level) for all years. The bottom panel shows the residuals from the reference level.
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Observed rate of the detected meteors in right ascension (RA) and declinati...
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Retrieval of mesospheric temperature from meteor radar and comparison with TIMED/SABER observation
Published: 17 April 2025
Figure 4.
Observed rate of the detected meteors in right ascension (RA) and declination (dec.) for one full day in each season. The number of meteors are counted in a bins of longitude and latitude, respectively, and normalized by the maximum count/bin in each plot so that the colour code in each panel co
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Implementation of LM algorithm for fitting the Gaussian model ( ) on the ...
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Retrieval of mesospheric temperature from meteor radar and comparison with TIMED/SABER observation
Published: 17 April 2025
Figure 6.
Implementation of LM algorithm for fitting the Gaussian model ( ) on the observed height distribution (left panel), and the corresponding estimation of mass index ( S ) from the normalized height distribution (right panel) for an example date (20 June). The dots are the observed data and the black
Journal Article
ACCEPTED MANUSCRIPT
StarDICE III: Characterization of the photometric instrument with a Collimated Beam Projector
RAS Techniques and Instruments, rzaf010, https://doi.org/10.1093/rasti/rzaf010
Published: 11 April 2025
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Cartoon of a disc–star system and the relevant coordinates. Top: side-on pr...
Published: 08 April 2025
Figure 1.
Cartoon of a disc–star system and the relevant coordinates. Top: side-on profile of the system where the line of sight of the observer enters from the left. Bottom: front profile of the system along the line of sight (i.e. the perspective of the observer where the view from the top panel is rotated
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An application of the method to an arbitrary PMS star. Top: the normali...
Published: 08 April 2025
Figure 2.
An application of the method to an arbitrary PMS star. Top: the normalized spectrum of the target (red solid line), the unbroadened spectral template (black and white dashed line), and the same spectral template broadened at 10, 20, and 40 km s (black and blue/yellow/green dashed lines, respe
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ECDF of values compared to that of a uniform distribution for 25 synthe...
Published: 08 April 2025
Figure 8.
ECDF of values compared to that of a uniform distribution for 25 synthetic systems. The pink samples and shaded region are mean values and standard deviations, respectively, of 1000 random draws from the estimated posteriors for each star in the synthetic sample. The orange solid line and sh
