Sains Malaysiana 38(4)(2009): 463–471 

Pemantauan dan Pencirian Cuaca-Angkasa di Kawasan UKM Bangi, Selangor Menggunakan Penerima GPS

(Monitoring and Characterization of Space Weather Over UKM Bangi, Selangor using GPS Receivers)

Wayan Suparta ^1,*, Baharudin Yatim¹& Mohd. Alauddin Mohd. Ali²

¹Institut Sains Angkasa (ANGKASA) Universiti Kebangsaan Malaysia

43600 UKM, Bangi, Selangor D.E., Malaysia

²Jabatan Kejuruteraan Elektrik, Elektronik dan Sistem

Fakulti Kejuruteraan & Alam Bina, Universiti Kebangsaan Malaysia

43600 UKM, Bangi, Selangor D.E., Malaysia

Diserahkan: 2 Mei 2008 / Diterima: 22 Disember 2008

ABSTRAK

Kajian ini dijalankan untuk mencirikan kepelbagaian kelakuan cuaca dalam lapisan bawah dan atas atmosfera,  terutama kebergantungannya kepada keadaan di dalam troposfera dan ionosfera pada enam stesen yang berbeza di UKM Bangi, Selangor. Pengukuran adalah berasaskan pemonitoran jangka pendek wap air bolehmendak (PWV) dalam troposfera dan jumlah kandungan elektron (TEC) dalam ionosfera menggunakan penerima GPS Bumi. Data PWV, TEC dan pengukuran meteorologi permukaan adalah dicerap bermula 12 November sehingga 7 Disember 2007. Hasil pemonitoran menunjukkan bahawa kedua-dua profil kebolehubahan PWV dan TEC memperlihatkan kitaran harian. Purata harian PWV dan TEC adalah tinggi, masing-masing dengan nilai ~42 mm dan ~35 TECU. Perubahan kedua-duanya didapati dipengaruhi aktiviti Matahari.

Kata kunci: Atmosfera; GPS PWV – TEC; ionosfera; UKM Bangi

ABSTRACT

This research was performed to characterize the variability of weather behavior in the lower and upper atmosphere layers, particularly its dependence on conditions in the troposphere and ionosphere at six different stations over UKM Bangi, Selangor. The measurements are based on short-term monitoring of precipitable water vapour (PWV) in the troposphere and total electron content (TEC) in the ionosphere using ground-based GPS receivers. Data on PWV, TEC and surface meteorological measurements were gathered from 12 November to 7 December 2007. Monitoring Results showed that both profiles of PWV and TEC variations shown diurnal cycle. The PWV and TEC on daily mean generally high, with a value of ~42 mm and ~35 TECU, respectively. It was found that both PWV and TEC variations exhibits influenced by solar activity.

Keywords: Atmosphere; GPS PWV – TEC; ionosphere; UKM Bangi  

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*Pengarang untuk surat-menyurat; email: wayan@ukm.my