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1
Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik
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Understanding climate changes in Malaysia through space weather study

100%
Hamidi Z. S., Shariff N. N. M., Monstein C.
International Letters of Natural Sciences
|
2014
|
tom 08
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nr 1
Space weather has a close connection with the interaction of the Earth and the Sun. As equatorial country, the characteristic features of the climate of Malaysia are uniform temperature, very high humidity and copious rainfall. Malaysia has an average of temperature of 26.7 °C per year. Therefore, it is suitable to monitor the Sun. In the following work, we will emphasize the development of Sun monitoring in Malaysia. The number of observatories are increasing. A dedicated work to understand the Sun activity in radio region is a part of an initiative of the United Nations together with NASA in order to support developing countries participating in „Western Science‟ research. Realizing how important for us to monitor the space weather, therefore, we have been utilizing the new radio spectrometer, CALLISTO (Compound Low Cost Low Frequency Transportable Observatories) spectrometer. Malaysia is one of the earliest country from South- East Asia (ASEAN) that involve this research. One of the advantages to start the solar monitoring in Malaysia is because our strategic location as equator country that makes possible to observing a Sun for 12 hours daily throughout a year. We strongly believe that Malaysia as one of contributor of solar activity data through E-CALLISTO network. This is a very good start for developing a space weather in Malaysia. With the implementation of CALLISTO systems and development of solar monitoring network, a new wavelength regime is becoming available for solar radio astronomy. Overall, this article presents an overview of space weather in Malaysia. With the present level of the international collaboration, it is believed that the potential involvement of local and international scientist in space weather will increase.
2

Solar burst type IV signature associated with solar prominences on 20th January 2016

100%
Hamidi Z. S., Hamzah N., Shariff N. N. M., Monstein C.
World Scientific News
|
2017
|
tom 70
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nr 2
3

An alternating of solar radio burst type III and IV of thermal and non-thermal plasma radiation

100%
Hamidi Z. S., Husien N. H., Shariff N. N. M., Monstein C.
World Scientific News
|
2016
|
tom 31
4

An analysis of radiation pattern and standing-wave ratio (SWR) of the gray Hoverman antenna

100%
Hamidi Z. S., Hamidin M. A., Shariff N. N. M.
World Scientific News
|
2016
|
tom 60
5

The Gray Hoverman antenna construction for meteor observation

100%
Hamidi Z. S., Hamidin M. A., Shariff N. N. M.
World Scientific News
|
2016
|
tom 56
6
Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik
Content available

Relativistic energy associated with amoving fiberburst type μIV associated with the class a solar prominence

100%
Hamidi Z. S., Norsham N. A. M., Shariff N. N. M., Monstein C.
World Scientific News
|
2016
|
tom 57 Special Volume
The relativistic energy electron emission is found to occur only during proton events. Solar prominences usually occur in loop shape and can last for weeks or months. This event allows us to investigatethe electron density and drift rate of solar burst type IV During 21st September 2015. During that time the Sun has the highest number of sunspots.The radio sources responsiblyfor Ivm appear to expand spherically through the solar corona after ejecton y solar flare. This event shows a strong radiation inradio region, but not in X-ray region. This burst intense radio phenomena that follow with solar flares. It has a wideband structure from 1412-1428 MHz. It can be considered as an intermediate f drift burst (IMDs). This fiber burst hasa negative drift rate where the drift is interpreted by the group velocity of the whistler-mode waves. Their bandwidth is approximately 2% of the emission frequency.The are accompanied a parallel-drift absorption band in the background continuum radiation. The occurrence of the event is interesting in many aspects which is also in ZSIS site. From the dynamic spectra of the CALLISTO, it can be observed that there a moving type IV burst. This burst appears is single SRBT III for approximately 16 minutes at 708UT till 716UT. This burst duration is longer compared to the other events. It can be considered as a IVμ because it begins at the same time as the explosive phase of solar flare.The solar optical, radio and X-ray emission associated with these various energetic particle emissions as well as the propagation characteristics of each particle species are examined in order to study the particle acceleration and emission mechanisms in a solar flare.At the same time, the number of particles traveled a given path in reconnecting area falls exponentially with increase of this path because of losses owing to a leaving of particles the acceleration volume due to drifts
7

The zigzag pattern construction of Log Periodic Dipole Antenna based on Rumsey’s principle

100%
Hamidi Z. S., Saad M. A. M., Shariff N. N. M., Monstein C.
World Scientific News
|
2016
|
tom 56
8

The development of long series of quasi-periodic pulsation in active region AR 2297

100%
Sabri N. U., Hamidi Z. S., Shariff N. N. M., Monstein C.
World Scientific News
|
2015
|
tom 09
9

An analysis of antenna temperature and radar cross section of Log Periodic Dipole Antenna

100%
Khalaf M. K., Saad M. A. M., Shariff N. N. M., Monstein C.
World Scientific News
|
2016
|
tom 55
10

Correlation between radio flux (10.7 cm) and sunspot number based on statistical properties

100%
Hamidi Z. S., Shariff N. N. M., Monstein C.
World Scientific News
|
2016
|
tom 52
11

An analysis of the electron density and drift rate of solar burst type III during 13th of May 2015

100%
Ali M. O., Hamidi Z. S., Shariff N. N. M., Monstein c.
World Scientific News
|
2016
|
tom 31
12

Geo-effective disturbances from the “Beta-Gamma-Delta” magnetic fields on active region AR 2403

76%
Sabri S. N. U., Hamidi Z. S., Shariff N. N. M., Monstein C., Zainol N. H., Ali M. O., Hussien N. H.
World Scientific News
|
2016
|
tom 37
13

The formation of fundamental structure of solar radio burst type II due X6.9 class solar flare

76%
Zainol N. H., Hamidi Z. S., Shariff N. N. M., Ali M. O., Husien N., Sabri S. N. U., Monstein C.
World Scientific News
|
2016
|
tom 35
14

Emergence of an impulsive CMEs related to solar radio burst type III due to magnetic filament eruption

76%
Ali M. O., Shariff N. N. M., Hamidi Z. S., Husien N. H., Sabri S. N. U., Zainol N. H., Monstein C.
World Scientific News
|
2016
|
tom 37
15

Heart-shape active region 2529 producing strong M6.7 class solar flare and Gradual Coronal Mass Ejections

76%
Hamidi Z. S., Ali M. O., Husien N. H., Sabri S. N. U., Zainol N. H., Shariff N. N. M., Monstein C.
World Scientific News
|
2017
|
tom 74
16

The enlargement of type II burst after type III at AR 12522 on 16th March 2016 In conjunction with flare-related Coronal Mass Ejections event

76%
Husien N., Hamidi Z. S., Shariff N. N. M., Ali M. O., Zainol N. H., Sabri S. N. U., Monstein C.
World Scientific News
|
2017
|
tom 70
|
nr 2
17
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Content available

Observation of the Radio Frequency Interference (RFI) at the National Space Centre, Malaysia

76%
Hamidi Z. S., Shariff N. N. M., Monstein C., Wan Zulkifli W. N. A., Ibrahim M. B., Arifin N. S., Amran N. A.
International Letters of Natural Sciences
|
2014
|
tom 05
Important results of the Radio Frequencies Interference (RFI) at the National Space Centre, Sg Lang Selangor, Malaysia has been reported. In order to make sure that the data of solar monitoring in radio region is reliable, we need to study the variation of interference and the possible sources that contribute to this interference. This data has been taken from 1-2000 MHz at the main site of installation e-CALLISTO system. The study is one of a main part of an initiative of e-CALLISTO networking research in order to identify the main RFI sources and to monitor continuously the behavior of the RFI at the site. Our main objective is to qualify the potential of monitoring a continuous radio emission of the Sun. This work is also an initiative of the International Space Weather Initiative (ISWI) project where Malaysia is one of the countries that joined the e-CALLISTO network. Due to our results this site showed the positive impact for the solar monitoring purpose. It is hoped that the survey will continue from time to time in a consistent mode so that any polluted signal for radio astronomy purpose can be protected. Overall, we can still get a good solar burst data, especially at 40-400 MHz. Perhaps, we can contribute the good data for solar burst monitoring towards the maximum cycle beginning the end of this year 2013.
18

Coronal electron density distribution estimated from meter type II radio bursts and Coronal Mass Ejections

64%
Yusof N. S., Hamidi Z. S., Norsham N. A., Jafini I., Kahlid N. M., Hamdan M. N., Kamaruddin F., Tahar M. R., Monstein C., Shariff N. N. M.
World Scientific News
|
2016
|
tom 46
19

Current situation of Radio Frequency Interference (RFI) profile at outdoor and indoor sites of faculty of applied sciences, UITM, Malaysia

64%
Hamidi Z. S., Nizamudin N. I., Shariff N. N. M., Syazwan M., Husien N., Ali M. O., Zainol N. H., Ramli N., Sabri S. N. U., Monstein C.
World Scientific News
|
2016
|
tom 40
20

The solar radio burst type II correlated with minor CME contributes to the production of geomagnetic disturbance

64%
Husien N., Hamidi Z. S., Ali M. O., Zainol N. H., Sabri S. N. U., Shariff N. N. M., Faid M. S., Ramli N., Monstein C.
World Scientific News
|
2016
|
tom 46
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