Application of matched filtering and parameter estimation technique to low latitude whistlers

R. P. Singh, D. K. Singh, Ashok K. Singh, D. Hamar, J. Lichtenberger

Research output: Contribution to journalArticle

20 Citations (Scopus)

Abstract

The Matched Filtering and Parameter Estimation (MFPE) technique developed for the analysis of mid/high latitude whistlers has been extended to analyze whistlers recorded at low latitude ground station Varanasi, India (geomagnetic latitude 14° 55′ N, longitude 153° 59′ E, L=1.07). Some of the whistlers recorded at Varanasi are found to have propagated along higher L-values (L>2). It has been argued that these whistlers after exiting the ionosphere have propagated towards the equator in the Earth-ionosphere waveguide. Trace splitting is observed below the nose frequency and above 2.0 kHz, a result in agreement with mid/high latitude whistlers. The trace splitting structure revealed by MFPE demonstrates the complexities of whistler wave propagation and is quite helpful in deriving information about high resolution features of the duct structure. The banded features observed in the dynamic spectrum are clearly seen in the output of the matched filter. The observed banded features may arise due to interference between the wavelets propagating in the duct/waveguide.

Original languageEnglish
Pages (from-to)1081-1092
Number of pages12
JournalJournal of Atmospheric and Solar-Terrestrial Physics
Volume61
Issue number14
Publication statusPublished - Sep 15 1999

Fingerprint

whistlers
tropical regions
ionosphere
ducts
polar regions
Earth-ionosphere waveguide
geomagnetic latitude
ground stations
matched filters
wave propagation
wavelet
equators
longitude
India
ionospheres
filter
parameter estimation
waveguides
interference
output

ASJC Scopus subject areas

  • Geophysics
  • Space and Planetary Science

Cite this

Application of matched filtering and parameter estimation technique to low latitude whistlers. / Singh, R. P.; Singh, D. K.; Singh, Ashok K.; Hamar, D.; Lichtenberger, J.

In: Journal of Atmospheric and Solar-Terrestrial Physics, Vol. 61, No. 14, 15.09.1999, p. 1081-1092.

Research output: Contribution to journalArticle

@article{b8548889fd8b48ff9ca71432fa31a14e,
title = "Application of matched filtering and parameter estimation technique to low latitude whistlers",
abstract = "The Matched Filtering and Parameter Estimation (MFPE) technique developed for the analysis of mid/high latitude whistlers has been extended to analyze whistlers recorded at low latitude ground station Varanasi, India (geomagnetic latitude 14° 55′ N, longitude 153° 59′ E, L=1.07). Some of the whistlers recorded at Varanasi are found to have propagated along higher L-values (L>2). It has been argued that these whistlers after exiting the ionosphere have propagated towards the equator in the Earth-ionosphere waveguide. Trace splitting is observed below the nose frequency and above 2.0 kHz, a result in agreement with mid/high latitude whistlers. The trace splitting structure revealed by MFPE demonstrates the complexities of whistler wave propagation and is quite helpful in deriving information about high resolution features of the duct structure. The banded features observed in the dynamic spectrum are clearly seen in the output of the matched filter. The observed banded features may arise due to interference between the wavelets propagating in the duct/waveguide.",
author = "Singh, {R. P.} and Singh, {D. K.} and Singh, {Ashok K.} and D. Hamar and J. Lichtenberger",
year = "1999",
month = "9",
day = "15",
language = "English",
volume = "61",
pages = "1081--1092",
journal = "Journal of Atmospheric and Solar-Terrestrial Physics",
issn = "1364-6826",
publisher = "Elsevier Limited",
number = "14",

}

TY - JOUR

T1 - Application of matched filtering and parameter estimation technique to low latitude whistlers

AU - Singh, R. P.

AU - Singh, D. K.

AU - Singh, Ashok K.

AU - Hamar, D.

AU - Lichtenberger, J.

PY - 1999/9/15

Y1 - 1999/9/15

N2 - The Matched Filtering and Parameter Estimation (MFPE) technique developed for the analysis of mid/high latitude whistlers has been extended to analyze whistlers recorded at low latitude ground station Varanasi, India (geomagnetic latitude 14° 55′ N, longitude 153° 59′ E, L=1.07). Some of the whistlers recorded at Varanasi are found to have propagated along higher L-values (L>2). It has been argued that these whistlers after exiting the ionosphere have propagated towards the equator in the Earth-ionosphere waveguide. Trace splitting is observed below the nose frequency and above 2.0 kHz, a result in agreement with mid/high latitude whistlers. The trace splitting structure revealed by MFPE demonstrates the complexities of whistler wave propagation and is quite helpful in deriving information about high resolution features of the duct structure. The banded features observed in the dynamic spectrum are clearly seen in the output of the matched filter. The observed banded features may arise due to interference between the wavelets propagating in the duct/waveguide.

AB - The Matched Filtering and Parameter Estimation (MFPE) technique developed for the analysis of mid/high latitude whistlers has been extended to analyze whistlers recorded at low latitude ground station Varanasi, India (geomagnetic latitude 14° 55′ N, longitude 153° 59′ E, L=1.07). Some of the whistlers recorded at Varanasi are found to have propagated along higher L-values (L>2). It has been argued that these whistlers after exiting the ionosphere have propagated towards the equator in the Earth-ionosphere waveguide. Trace splitting is observed below the nose frequency and above 2.0 kHz, a result in agreement with mid/high latitude whistlers. The trace splitting structure revealed by MFPE demonstrates the complexities of whistler wave propagation and is quite helpful in deriving information about high resolution features of the duct structure. The banded features observed in the dynamic spectrum are clearly seen in the output of the matched filter. The observed banded features may arise due to interference between the wavelets propagating in the duct/waveguide.

UR - http://www.scopus.com/inward/record.url?scp=0038826632&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0038826632&partnerID=8YFLogxK

M3 - Article

VL - 61

SP - 1081

EP - 1092

JO - Journal of Atmospheric and Solar-Terrestrial Physics

JF - Journal of Atmospheric and Solar-Terrestrial Physics

SN - 1364-6826

IS - 14

ER -