Skip to main content

The Case for PAGASA's Doppler Radars

To get a better view of the storms approaching the country, the Philippine Atmospheric, Geophysical and Astronomical Services Administration (PAGASA) is looking to several more doppler radars across the country —on top of the three operational ones it is currently using for weather forecasting.

PAGASA in Bato

In a phone interview with GMA News Online, PAGASA's engineering and technology services division OIC Engr. Edwin Mandreza said the deployment of the radars in Antique, Busuanga and Zamboanga are currently in the planning stages.

On the other hand, two radars in Virac, Catanduanes and Tagaytay City, Cavite, are currently under construction, and will be finished before the year ends, Mandreza said.

Meanwhile, the doppler radar in Mactan, Cebu, will begin construction after the Tagaytay radar becomes operational by the end of 2011, while the radar in Hinatuan, Surigao del Sur is still being calibrated, he added.

A new doppler radar in Tampakan, South Cotabato, on the other hand, is set to begin construction this year.

The existing ones that PAGASA is using are located in Baguio City, Baler in Aurora and in Subic.

He added that their automated weather stations in Aparri and in Guiuan, Eastern Samar, which were funded by the Japan International Coordinating Agency, will soon have doppler radars of their own, too.

Mandreza said that should the agency complete its plans to have a total of 13 doppler radars sprawled across the country, it will give the agency a better view of oncoming storms and in turn give more accurate weather predictions.

On average, these doppler radars have a maximum coverage of about 480 kilometers, enough to produce images of weather disturbances far out at sea.

Mandreza clarified, however, that some of these radars have "blind spots" due to certain obstructions, such as towering mountains in the provinces.

He cited the case of the radars in Baguio and Baler, which could not accurately measure weather conditions in Metro Manila due to the blockage caused by the Sierra Madre Mountain Range.
Kaya nagtayo ng radar sa Subic, para mas kaunti ang obstruction at malapit-lapit sa Metro Manila,
he said.

These obstructions, he said, are one of the primary considerations of PAGASA in determining where to place their radars.

When mountains, for example, are near the radar, the microwave signal that the radar emits will quickly bounce back even before the radar's receiver opens to register the returning signal, which produces a blind spot in the radar image.

On most occasions, he added, these radars are placed on coastal lines, since these are the areas that often come in contact with different weather disturbances.

Compared with weather satellites, Mandreza said doppler radars are more accurate and useful since they have the ability to also measure middle and lower clouds, while the former can only produce images of the top view of the clouds.
When it comes to measuring the amount of rainfall, it's very accurate. Maganda ang estimation. Nakikita niya kasi ang mga middle and lower clouds, na nakaka-affect rin sa area,
he said.

He added that the radars placed in different altitudes also help in accurately pinpointing the location of the storm, which would not be possible using satellite images.
Pag ang bagyo ay mababa, sa Guiuan makikita 'yan. Kapag tumaas, sa Virac, tapos kapag tumaas pa ulit, sa Baguio,
he explained.

Though they already have the plans outlined, Mandreza said that as a government agency, they are also struggling to fund the deployment of the doppler radars they are planning to place in the coming years.

A typical mid-range radar (like the ones PAGASA is currently using), according to Mandreza, costs around P60 to P70 million pesos, while the more high-end ones sell for about P80 to P100 million pesos.

Source: GMA News Online

Popular posts from this blog

2008 Civil Service Examination Passers - Examination Passers

Civil Service Examination - Subprofessional
CSC RO V - Rawis, Legazpi City
Date: November 16, 2008 Seq # Examinee No. Examinee Name 1 582872ABALON, MARIAN DOROTHY O 2 586574ABRAGAN, MICHAEL FRANCIS F 3 586733ACAL, KAREN KAYE I 4 586575ACERON, MILANDRO B 5 582785ADOPTANTE, ANGELO LESTER N 6 582766AGUILAR, JEROSS R 7 582952AGUILAR, RORY S 8 586835ALPARAN, OLIVE A 9 586847ALVAREZ, MICHAELSON Y 10 582594ALVAREZ, SEYCHELLE M 11 582572ANGELES, MIRALYN A 12 582669ARCILLA, ARMIE A 13 582904ARCOS, EDEN R 14 582790ATIGA, RIENA M 15 586625AUREUS, EDGAR MANUEL A 16 582761AVENIDO, PRECIOUS B 17 582942AZORES, MYLA E 18 586762BAESA, MARC EDWIN S 19 582559BAEZA, ROWEL G 20 582682BAGHERI, CHERRYMAE C 21 586783BALINGBING, MAY ANN A 22 586661BARBONIO, EUGENE P 23 582812BARRAMEDA, LESLIE H 24 586558

Bicol Registers RP's Fastest 2009 Economic Growth Rate at 8.2%

Legazpi City (12 August) -- Bicol Region's economy grew by 8.2 per cent in 2009, twice its pace in 2008 and much faster than the 1.1 per cent growth at the national level, reports the National Statistical Coordination Board (NSCB) in Bicol. The same report shows that the industry sector remained the strongest performer with an 18.3 per cent expansion. Bicol Region topped all other regions in the country in terms of growth. The Service sector, which remained the biggest contributor to the region's output at 41.8 per cent, grew at a faster rate of 5.0 per cent from 3.8 per cent the previous year. Except for Transportation, Communication and Storage, all subsectors recorded accelerated growths. Growth of Transportation, Communication and Storage slipped to 4.2 per cent from 4.3 per cent in 2008. Trade, on the other hand posted a 2.8 per cent growth, a very slight improvement from the 2.7 per cent expansion in 2008. Similarly, Finance registered an uptrend at 8.5 per cent in 2…

The Good and Bad Sides of Jollibee Virac

Reports say that Jollibee Foods Corporation failed to hit its target of P1-million in sales during the opening day of its Virac store. Still, the reported P740,000 total gross sales is easily the biggest ever for a local store. Too bad most of that moolah is going to Manila to the coffers of the giant fastfood corporation. This is the bad side of having Manila-owned stores like Jollibee, which gets all its raw materials from its commissary in Laguna. The most that it can do to repay Catandunganons who fork over their hard-earned money for burgers, spaghetti, fries and chicken is to at least have the Jollibee Foundation spearhead CSR projects like the Busog-Lusog-Talino feeding program for indigent kinder pupils, build a classroom here and there, and hire local students as restaurant crew under its Skills Enhancement and Education Development for Students (SEEDS) program tie-up with DOLE. On the side, local fast food establishments need not fret over the Jollibee thing; their burge…

10 CSU Graduates Top Bicol Placers in Teachers Exams

LEGAZPI CITY, Jan. 16 (PNA) -- The Professional Regulation Commission (PRC) announced here Wednesday that 10 graduates of the Catanduanes State University (CSU) landed at the top 10 among those who passed the recent Licensure Examination for Teachers (LET) in Bicol. The PRC identified the top 10 passers as Carlito T. Gelito, Joan S. Guerrero, Jinky Lou T. Sarmiento, Ronald A. Teves, Ian Lopez, Eddie Cadag, Donna Nerisse Sapico, Aizel Cerillo, Melvin Fernandez and Daniel L. Alfaro. Gelito placed 3rd in the regional and 10th in the national levels; Guerrero, 4th with 85.80 percent; Sarmiento, 4th with 85.80 percent; Teves, 4th placer with 85.80 percent; Lopez, 5th with 85.60 percent; Cadag, 6th with 85.40 percent; Sapico, 6th with 85.40 percent; Cerillo, 7th with 85.20 percent; Fernandez, 8th with 85 percent and; Alfaro, 9th with 84.80 percent. The PRC, through its Board for Professional Teachers, also honors top 10 placers in the regional level of the LET examinations separately fr…

Bicol Plantations to Receive Grant Money - BM

SORSOGON CITY—Abaca and coconut plantations in the Bicol region have been identified and placed by the Department of Agriculture (DA) under its technology commercialization (TechCom) program which is funded by a grant from the government of Japan. The grant, according to DA regional executive director Jose Dayao, was under Japan’s 2KR (Kennedy Round)-Grant Assistance for Underprivileged Farmers (GAUF) that aims to support a range of diverse projects that adopt appropriate technology for commercial use. Last year, the Tokyo approved a ¥300-million grant under 2KR- GAUF for the Philippines to help tillers who can barely meet their families’ basic needs to raise their income and yield per hectare. The grant equivalent to $2.59 million would benefit small farmers in the country’s poorest provinces, according to Agriculture Secretary Arthur Yap. The project for Bicol’s abaca farms intends to enhance productivity through integrated-farming system dubbed Abakayamanan Program spearheaded…