ODA_Reprints: Recent submissions

Now showing items 101-120 of 185

Thunderstorms, lightning, sprites and magnetospheric whistler-mode radio waves

Siingh, Devendraa; Singh, A.K.; Patel, R.P.; Singh, Rajesh; Singh, R.P.; Veenadhari, B.; Mukherjee, M. (2008)

Thunderstorms and the lightning that they produce are inherently interesting phenomena that have intrigued scientists and mankind in general for many years. The study of thunderstorms has rapidly advanced during the past ...
Low-latitude geomagnetic response to the interplanetary conditions during very intense magnetic storms

Rawat, Rahul; Alex, S.; Lakhina, G.S. (2009)

The variations in the horizontal and declination components of the geomagnetic field in response to the interplanetary shocks driven by fast halo coronal mass ejections, fast solar wind streams from the coronal hole regions ...
TEC variations during low solar activity period (2005–2007) near the Equatorial Ionospheric Anomaly Crest region in India

Bagiya, Mala S.; Joshi, H.P.; Iyer, K.N.; Aggarwal, Malini; Ravindran, S.; Pathan, B.M. (2009)

The dual frequency signals from the GPS satellites recorded at Rajkot (22.29° N, 70.74° E, Geographic, 14.03° N Geomagnetic) near the Equatorial ionization anomaly crest in India have been analyzed to study the ionospheric ...
Equatorial and low latitude geomagnetic field oscillations in the Indian region

Bhardwaj, S.K. (2009)

Monthly mean hourly values of geomagnetic field components D, H and Z for quiet days at equatorial and low latitude stations in the Indian region are analyzed to study the salient features of geomagnetic field oscillations ...
Tectonomagnetic study in the seismoactive area of Narmada-Son lineament, central India: Preliminary results on repeat field observations

Waghmare, S.Y.; Pimprikar, S.D.; Gawali, P.B.; Carlo, L.; Patil, A.G. (2009)

Repeated measurements of the total geomagnetic field on the five profiles have revealed a picture of stress-induced tectonomagnetic effect in the form of secular variation of the total geomagnetic field in the tectonically ...
High-Gain transimpedance amplifier (TIA) for night airglow photometer

Patil, P.T.; Mukherjee, G.K.; Sharma, A.K.; Mudholkar, R.R. (2009)

This paper describes a simple, inexpensive transimpedance amplifier (TIA) suitable to convert the fast current pulses delivered by photomultiplier tube of night airglow photometer into the corresponding voltage. Design ...
Complexities in the variation of declination component (D) of the geomagnetic field in the Indian region

Alex, S.; Jadhav, L.; Rao, D.R.K. (1992)
Geomagnetic Investigation in the Seismoactive area of Narmada-Son Lineament, Central India

Waghmare, S.Y.; Carlo, L.; Gawali, P.B.; Patil, A.G. (2008)

Activation of Narmada south fault caused the devastating Jabalpur earthquake (6.0 M) on May 22, 1997. To understand the secular variation of the total geomagnetic field in the vicinity of Narmada south fault, particularly ...
The new digital Ah index of geomagnetic activity at Alibag and other stations

Martini, D.; Mursula, K.; Alex, S. (2009)

The geomagnetic activity carries important information about various parameters of the near-earth space and the solar magnetic activity on short as well as on long-term scales. In short or moderately long-term studies, the ...
Applying least square based technique to proton magnetometer

Patil, Arun; Rajaram, R. (2007)

A proton magnetometer has been designed using a microcontroller. Microcontroller is used to implement a least square based signal processing technique to estimate the precession frequency of proton precessions. The dependence ...
Investigation of the response of equatorial MLTI region during a partial solar eclipse through ground-based daytime optical technique

Vineeth, C.; Pant, T.K.; Thampi, Smitha V.; Sridharan, R.; Ravindran, Sudha; Devasia, C.V.; Kumar, K. Kishore; Alex, S. (2008)

[1] First experimental evidence for solar eclipse induced changes in the equatorial mesopause and the thermosphere ionosphere regions using daytime optical photometer is presented. The photometer was operated in scanning ...
Features of discrete VLF emissions observed at Gulmarg, India during the magnetic storm of 6–7 March, 1986

Singh, Rajesh; Singh, A.K.; Siingh, Devendraa; Singh, R.P. (2007)

During the analysis of archived VLF data from Indian low latitude ground stations, some discrete VLF emissions recorded at the low latitude ground station Gulmarg (geomagnetic latitude 24°26′N; geomagnetic longitude 147°09′E, ...
An explanation of the observation of pulsing hiss at low latitude

Singh, A.K.; Singh, Rajesh; Singh, Kalpana; Singh, R.P. (2008)

In this paper we report pulsing hiss emissions observed at the low latitude station, Jammu (geomag. lat. 22°26′N, L = 1.17) in which intensity decreases with the increase in frequency. The entire dynamic spectra contain ...
Geomagnetic storm characteristics under varied interplanetary conditions

Rawat, Rahul; Alex, S.; Lakhina, G.S. (2007)

Solar cycle-23 witnessed many successive intense X-ray solar flares and coronal mass ejections (CME) during the peak activity period, as well as in the descending phase of the cycle. Some of these emissions had large solar ...
VLF Emissions observed at the low latitude Indian station Varanasi

Patel, R.P.; Singh, A.K.; Singh, S.; Singh, Rajesh; Singh, K.; Singh, R.P. (2008)

VLF emissions such as hiss, chorus, pulsing hiss, triggered emissions observed at Varanasi (geom. lat. = 14° 55′ N, long. = 153° 55′ E) are reported. An attempt has been made to explain the dynamic spectra in terms of the ...
Vector PPM setup using four coil Barker system and 0.1 nT PPM

George, Annieamma; Balasubramaniam; Dhapre, V.Y.; Patil, A.; Iyengar, R.V.; Saraf, P.D. (2007)

The design of four coil (identical air cored) Barker circular coils for producing an extended uniform magnetic field is described. The paper explains in detail how the coil system is interfaced with 0.1nT PPM to make it a ...
Day-to-day variability in the occurrence characteristics of Sq focus during d-months and its association with diurnal changes in the Declination component

Alex, S.; Jadhav, Madhavi (2007)

Scrutiny of the geomagnetic observations of the Declination component “D” from equatorial and low-latitude locations in the Indian longitude revealed anomalous variations during d-months. Examination of the Quiet day (Ap≤7) ...
Storm time magnetic field variations at low latitude and its association with solar wind parameters

Vichare, Geeta; Alex, S. (2006)

It is known that interplanetary plasma has significant influence on the storm time magnetic field variations observed on the surface of the earth. It has been well observed that the southward component of interplanetary ...
Space weather effects on low latitude geomagnetic field and ionospheric plasma response

Veenadhari, B.; Alex, S. (2006)

Space weather disturbances caused by enhanced stream of solar plasma during solar flares and Coronal Mass ejections (CMEs) are known to disrupt communications, endanger satellite payloads and introduce severe errors in a ...
Low latitude geomagnetic signatures following two major solar energetic particle events at different phases of solar cycle-23

Rawat, Rahul; Alex, S.; Lakhina, G.S. (2006)

Occurrence of transient astrophysical phenomena is well known to enhance greatly during the solar maximum period. Acceleration of energetic particles takes place in abundance at heliosphere by different transient processes, ...

Now showing items 101-120 of 185

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