Current Research
My research deals with the measurement and modeling of space weather over the Philippines, specifically the ionosphere, using various radio sounding technologies, and its application to radio wave propagation. Specifically, I did some work on the application of the TaiWan Ionosphere Model in providing ionospheric corrections to single-frequency GPS receiver using both stand-alone and differential positioning. I also did some work on the use of a vertical and oblique VIPIR ionosonde in observing ionospheric irregularities associated with equatorial and low latitude spread F.
Currently, I focus on the use of GNSS to estimate ionospheric total electron content and study its response to geomagnetic and solar activities and its effects to radio wave propagation. I also estimate tropospheric perceptible water vapor content using GNSS and radiosondes and compare it with hydrological and meteorological phenomena.
Currently, I focus on the use of GNSS to estimate ionospheric total electron content and study its response to geomagnetic and solar activities and its effects to radio wave propagation. I also estimate tropospheric perceptible water vapor content using GNSS and radiosondes and compare it with hydrological and meteorological phenomena.
Research Projects
“Using wireless environmental monitoring sensors in assessing the impact of megacity environmental pollution and local climate on butterfly diversity in Manila, Philippines”
Participation: Research Team Member
Funding Agency: Commission on Higher Education, Discovery-Applied Research and Extension for Trans/Inter-disciplinary Opportunities (CHED DARE-TO) Research Grant
Budget: PhP13,000,000.00
Duration: December 2016 – November 2018
“Observation and analysis of L-Band ionospheric scintillation over the Philippines during the onset of Solar Cycle 24 (2009-2014)”★
Participation: Project Leader
Funding Agency: Mapúa University, Directed Research for Innovation and Value Enhancement (DRIVE)
Budget: PhP 234,500.00
Duration: April 2017 – December 2017
“Development of a real-time microcomputer based data acquisition system for a very low frequency (VLF) monitor for space weather studies”★
Participation: Research Team Member
Funding Agency: Mapúa University, Directed Research for Innovation and Value Enhancement (DRIVE)
Budget: PhP 285,000.00
Duration: April 2017 – December 2017
Participation: Research Team Member
Funding Agency: Commission on Higher Education, Discovery-Applied Research and Extension for Trans/Inter-disciplinary Opportunities (CHED DARE-TO) Research Grant
Budget: PhP13,000,000.00
Duration: December 2016 – November 2018
“Observation and analysis of L-Band ionospheric scintillation over the Philippines during the onset of Solar Cycle 24 (2009-2014)”★
Participation: Project Leader
Funding Agency: Mapúa University, Directed Research for Innovation and Value Enhancement (DRIVE)
Budget: PhP 234,500.00
Duration: April 2017 – December 2017
“Development of a real-time microcomputer based data acquisition system for a very low frequency (VLF) monitor for space weather studies”★
Participation: Research Team Member
Funding Agency: Mapúa University, Directed Research for Innovation and Value Enhancement (DRIVE)
Budget: PhP 285,000.00
Duration: April 2017 – December 2017
Journal Publications
For copies, do not hesitate to email me here.
Mendoza, M.M., and E.P. Macalalad. 2023. "Response of the Ionospheric Total Electron Content During St. Patrick's Day Geomagnetic Storm in 2015 over the Philippine-Taiwan Region" Philippine Journal of Science 152 (S1): 79-88 (SCOPUS, Web of Science) [link]★
Maglambayan, V.L.L., and E.P. Macalalad. 2022. "Two-Dimensional Mapping of Ionospheric Total Electron Content over the Philippines Using Kriging Interpolation" Atmosphere 13, no. 10: 1626. https://doi.org/10.3390/atmos13101626 (SCOPUS, Web of Science) [link]★
Hsiao, T.Y., C.Y. Huang, W.H. Yeh, T.P. Tseng, K.L. Chen, E.P. Macalalad, E.A. Vallar and M.C.D. Galvez. 2022 "The observations of localize ionospheric scintillation structure by FORMOSAT-7/COSMIC-2 Tri-band Beacon network" Terrestrial, Atmospheric and Oceanic Sciences vol. 33, no. 10 https://doi.org/10.1007/s44195-022-00010-6 (SCOPUS, Web of Science) [link]★
Domingo, A.L.S., and Macalalad, E.P. 2022. "Temporal Analysis of GNSS-Based Precipitable Water Vapor during Rainy Days over the Philippines from 2015 to 2017" Atmosphere 13, no. 3: 430. https://doi.org/10.3390/atmos13030430 (SCOPUS, Web of Science) [link]★
Galvez, M. C., E. Vallar, T. Shiina, E. Macalalad, and P. Mandia. 2021. "Time-Domain Optical Coherence Tomography System for Determining the Extinction Coefficient and Group Refractive Index of Gelatin-Based Skin Phantoms." Science and Technology Indonesia 6 (4): 319-327. doi:10.26554/sti.2021.6.4.319-327. (SCOPUS) [link]
Galvez, M.C.D., Vallar, E.A., Shiina, T., Macalalad, E.P. & Mandia, P.F. 2021, "Jitter Correction and SNR Improvement of A-Scan Signal Using Wavelet Denoising and Signal Averaging for a Portable Time-Domain Optical Coherence Tomography System", Advanced Science, Engineering and Information Technology, vol. 11, no. 5, pp. 1756-1762. (SCOPUS) [link]
Nacua, A.E., Clemente, K.J., Macalalad, E.P., Deocaris, C.C. & Galvez, M.C. 2020, "Urban Diversity of Butterflies as a Biological Indicator of an Air Quality in Manila, Philippines", Asian Journal of Conservation Biology, vol. 9, no. 2, pp. 315-321. (SCOPUS, Web of Science)
Nacua, A.E., Clemente, K.J., Macalalad, E.P., Galvez, M.C., Belo, L.P., Orbecido, A.H. & Deocaris, C.C. 2020, "Butterflies behaviors and their Natural Enemies and Predators in Manila, Philippines", Asian Journal of Conservation Biology, vol. 9, no. 2, pp. 240-245. (SCOPUS, Web of Science)
Saccuan, A.J.H. R.B. Deveza, S.L. Lamod, J.F. Villaverde, E.P. Macalalad, “Development of a real-time microcomputer-based data acquisition system for a very low frequency (VLF) monitor for space weather studies”, ARPN Journal of Engineering and Applied Sciences. 13(24), 9480-9487, 2018 (SCOPUS) [link]★
Vergara, R.l., E.P. Macalalad, G. Bagtasa, E.A. Vallar, M.C.D. Galvez, R.V. Francisco, “Correlation of Aerosol Optical Properties with Surface Meteorological Parameters over Manila”, Adv. Sci. Lett., 23, 1448-1451. doi:10.1166/asl.2017.8375 2017 (SCOPUS) [link]
Macalalad, E.P., L.C. Tsai, J. Wu “Performance Evaluation of Different Ionospheric Models in Single-Frequency Code-Based Differential GPS Positioning”, GPS Solutions, 20(2), 173–185 DOI: 10.1007/s10291-014-0422-4, 2016. (SCOPUS, Web of Science)★
Francisca, D., E. Macalalad, E. Vallar, M. C. Cecilia Galvez, L.C. Tsai, T.Y. Hsiao, “VHF/UHF Amplitude Scintillation Observed By The Low-Latitude Ionospheric Tomography Network (LITN)”, ARPN Journal of Engineering and Applied Sciences. 10(22), 10324-10327, 2015 (SCOPUS) [link]★
L.C. Tsai, E.P. Macalalad, C.H. Liu, “TaiWan Ionospheric Model (TWIM) prediction based on time series autoregressive analysis” Radio Science 49, DOI: 10.1002/2014RS005448. 2014 (SCOPUS, Web of Science)★
Macalalad, E.P., L.C. Tsai, J. Wu, C.H. Liu, “ Application of the TaiWan Ionospheric Model to single-frequency ionospheric delay corrections for GPS positioning”, GPS Solutions, 17(3), DOI 10.1007/s10291-012-0282-8. 2013 (SCOPUS, Web of Science)★
Vergara, R. L., E. P. Macalalad, G. Bagtasa, E. A. Vallar, M. C. D. Galvez, “Diurnal Characteristics of Angstrom Turbidity Parameters Over Manila, Philippines”, IOSR Journal Of Environmental Science, Toxicology And Food Technology, DOI 10.9790/2402-0525964. 2013
Scopus-Indexed Conference Papers
For copies, do not hesitate to email me here.
Z. Domingo, E. Macalalad and A. Yoshikawa, "Geomagnetic field effects over the Philippines during strong solar flare events in April 2022," 2023 8th International Conference on Space Science and Communication (IconSpace), 2023 (Abstract - To be indexed in SCOPUS) ★
J. M. Cabral, R. M. Dizon, S.G. Morales, L. H. Pujida and E. Macalalad, "The Variations of Precipitable Water Vapor and Rainfall in Puerto Princesa and Legazpi City during the Philippine Southwest Monsoon Season from 2013-2022," 2023 8th International Conference on Space Science and Communication (IconSpace), 2023 (Abstract - To be indexed in SCOPUS) ★
M. F. J. Bona, U. Buni, V. Cordova, L. G. Licup and E. Macalalad, "Rapid Intensifying Tropical Cyclones in the Philippine Area of Responsibility from the year 1991 to 2020," 2023 8th International Conference on Space Science and Communication (IconSpace), 2023 (Abstract - To be indexed in SCOPUS)
C. D. Aquino and E. Macalalad, "Preliminary Analysis on the Effect of Temperature on LSTM-based PWV Forecasting," 2023 8th International Conference on Space Science and Communication (IconSpace), 2023 (Abstract - To be indexed in SCOPUS) ★
A. Bibaoco, P. Tucio and E. Macalalad, "Comparison of Precipitable Water Vapor and Sea Surface Temperature Anomalies over the Tanay and Legazpi, Philippines from 2013-2022," 2023 8th International Conference on Space Science and Communication (IconSpace), 2023 (Abstract - To be indexed in SCOPUS) ★
A. De Castro, P. Tucio and E. Macalalad, "Intercomparison of MODIS- and GNSS-based Precipitable Water Vapor over Manila, Philippines in 2015," 2023 8th International Conference on Space Science and Communication (IconSpace), 2023 (To be indexed in SCOPUS) ★
M.C.D. Galvez, R. de Lara, P. Mandia, E. Vallar, E. Macalalad and T. Shiina, "Leaf Structure and Attenuation Coefficients of Citrofortunella microcarpa Leaves Using a Portable TD-OCT System," ECS Transactions, 2022 107(1) DOI:https://doi.org/10.1149/10701.2243ecst [link]
J. Kalaw, E. Macalalad, R. M. Guido, P. Tucio and P. P. Divinagracia, "Ionospheric Storm Caused in 2015 by Intense Geomagnetic Storms over Metro Manila, Philippines," 2021 7th International Conference on Space Science and Communication (IconSpace), 2021, pp. 103-108, doi: 10.1109/IconSpace53224.2021.9768676., [link]★
P. P. Divinagracia, E. Macalalad, R. M. Guido, P. Tucio and J. Kalaw, "Preliminary Analysis of Satellite Navigation Effects of the Strong Solar Flares during Solar Cycle 24," 2021 7th International Conference on Space Science and Communication (IconSpace), 2021, pp. 109-112, doi: 10.1109/IconSpace53224.2021.9768696.[link]★
R. M. Guido, E. Macalalad, J. Kalaw, P. Tucio and P. P. Divinagracia, "Preliminary Observations of Cold-Point Tropopause Temperature, Altitude, and Pressure in 2020 over Laoag, Philippines Using Radiosonde," 2021 7th International Conference on Space Science and Communication (IconSpace), 2021, pp. 1-4, doi: 10.1109/IconSpace53224.2021.9768713. [link]★
P. Tucio, E. Macalalad, R. M. Guido, J. Kalaw and P. P. Divinagracia, "Ionospheric Precursor Associated to the 2012 Sumatra Earthquake Observed over the Taiwan-Philippines Region using GNSS-TEC," 2021 7th International Conference on Space Science and Communication (IconSpace), 2021, pp. 202-206, doi: 10.1109/IconSpace53224.2021.9768729. [link]★
R. A. Balajadia, A. L. S. Domingo and E. P. Macalalad, "Variations of Precipitable Water Vapor Associated with TY Haima in 2016 over the Philippines using Global Navigation Satellite System," 2021 7th International Conference on Space Science and Communication (IconSpace), 2021, pp. 207-210, doi: 10.1109/IconSpace53224.2021.9768739. [link]★
Y. Rivera, K.C. Capacete, S.K. Rodriguez, A.R. David and E. Macalalad, "Variations of Precipitable Water Vapor from 2012 to 2019 over the Philippines using Radiosondes", 4th International Conference on Science and Technology Applications in Climate Change (STACLIM 2021), IOP Conf. Series: Earth and Environmental Science 880 (2021) 012001 doi:10.1088/1755-1315/880/1/012001 [link]★
K. E. Juadines, A. Ballado, E. Macalalad and M. Mendoza, "Development of a MATLAB Web-based Application for Calculating Ionospheric Scintillation Proxy Indexes (S4p-1 and S4p-2) and the Rate of Total Electron Content Index (RoTI)," 2021 IEEE World AI IoT Congress (AIIoT), 2021, pp. 0221-0225, doi: 10.1109/AIIoT52608.2021.9454235 [link].★
V.L.L.Maglambayan, M.M.Mendoza, E.P. Macalalad, "2-Dimensional Regional Mapping of Ionospheric Total Electron Content using Kriging Interpolation over the Philippines: Initial Results", Journal of Physics Conference Series, 2021 1936(1):012012 DOI: 10.1088/1742-6596/1936/1/012012 [link]★
R. Eugenio, E.P. Macalalad, "Monthly Observations of Cold-point Tropopause Temperature and Height for 2008 in the Philippines Using COSMIC GPS Radio Occultations", Journal of Physics Conference Series, 2021 1936(1):012019 Follow journal DOI: 10.1088/1742-6596/1936/1/012019 [link]★
A.M.S. Desquitado, M.R.R. Perez, R.S.R. Puchero, E.P. Macalalad, "A climatological study of typhoons over the Philippine Area of Responsibility from 1989-2018", E3S Web of Conferences 200 (2020) 02001 DOI:https://doi.org/10.1051/e3sconf/202020002001 [link]★
A.L.S. Domingo, E.P. Macalalad, "Multi-year Precipitable Water Vapor Observations in East Manila, Philippines using Radiosonde and Global Navigation Satellite System", E3S Web of Conferences 199 (2020) 00002 DOI: https://doi.org/10.1051/e3sconf/202019900002 [link]★
A.C.S. Abesamis, M.M., Abrigonda, E.E.P. Privado, J.F. Villaverde, E.P. Macalalad, "A Development of Microcontroller Based LED Sunphotometer with Sun-tracking System for Measuring Aerosol Optical Depth", ACM International Conference Proceeding Series, 2020, pp. 140-144, 3384636 [link]
P.F. Mandia, E.A. Vallar, T. Shiina, E.P. Macalalad, M.C.D. Galvez, "Time-domain optical coherence tomography and gelatin-based skin phantom as training tools for venipuncture", Journal of Physics: Conference Series 1593 (1), 012032 [link]
M. M. Mendoza, K. E. S. Juadines, E. P. Macalalad and H. Tung-Yuan, "A Method in Determining Ionospheric Total Electron Content Using GNSS Data for non-IGS Receiver Stations," 2019 6th International Conference on Space Science and Communication (IconSpace), Johor Bahru, Malaysia, 2019, pp. 186-191. doi: 10.1109/IconSpace.2019.8905958 [link]★
E. P. Macalalad and R. V. Macalalad, "Variation of GNSS-derived Precipitable Water Vapor Over Manila in 2017," 2019 6th International Conference on Space Science and Communication (IconSpace), Johor Bahru, Malaysia, 2019, pp. 235-238. doi: 10.1109/IconSpace.2019.8905973 [link]★
K. E. S. Juadines, E. P. Macalalad and M. M. Mendoza, "Observation of Low-Latitude Ionospheric Irregularities using Rate of Change of Total Electron Content over the Philippine Sector," 2019 6th International Conference on Space Science and Communication (IconSpace), Johor Bahru, Malaysia, 2019, pp. 112-115. doi: 10.1109/IconSpace.2019.8905976 [link]★
M. M. Mendoza, E. P. Macalalad and K. E. S. Juadines, "Analysis of the Ionospheric Total Electron Content during the Series of September 2017 Solar Flares over the Philippine - Taiwan Region," 2019 6th International Conference on Space Science and Communication (IconSpace), Johor Bahru, Malaysia, 2019, pp. 182-185. doi: 10.1109/IconSpace.2019.8905982 [link]★
R. B. Deveza, S. M. L. Lamod, A. J. H. Saccuan, J. F. Villaverde and E. P. Macalalad, "Development of a Microcomputer-Based Data Acquisition System for the SuperSID Monitor in the Philippines," 2018 IEEE 10th International Conference on Humanoid, Nanotechnology, Information Technology,Communication and Control, Environment and Management (HNICEM), Baguio City, Philippines, 2018, pp. 1-5. doi: 10.1109/HNICEM.2018.8666229 [link]★
Francisca, D., Vallar, E., Macalalad, E., Galvez, M.C., Tsai, L.-C., "Matlab-based VHF and UHF amplitude scintillation characterization using the new low-latitude ionospheric tomography network (LITN)" Proceedings of the 34th Asian Conference on Remote Sensing (2013)★
Tsai, L.-C., Macalalad, E.P., Tien, M.H., Liu, C.H.. "The TaiWan Ionospheric Model (TWIM) and model prediction using autocorrelation method" Proceedings of the 34th Asian Conference on Remote Sensing (2013)
Galvez, M. C. D., E. P. Macalalad, T. A. Peralta, J. N. Rosete, E. A. Vallar, “Simultaneous Scanning Lidar Measurement and Air Sampling Using A Personal Cascade Impactor for Traffic Aerosol Characterization,” Proceedings of the 33rd Asian Conference on Remote Sensing (2012)
Tsai, L. C., C. W. Zheng, E. P. Macalalad, G. H. Chen, M. H. Tien, “The Improved Taiwan Ionospheric Model (TWIM) and its and its Applications on GPS Positioning ,” Proceedings of the 33rd Asian Conference on Remote Sensing (2012)
Macalalad, E., L.C.Tsai, J.Wu, “Ionospheric Delay Correction Using the Taiwan Ionospheric Model (TWIM) for Single-Frequency GPS Receiver”, Proceedings of the 32nd Asian Conference on Remote Sensing (2011)
Tsai, L.C., G. H. Chen, M. H. Tian, E. P. Macalalad, “The Taiwan Ionospheric Model (TWIM) And Its Applications On Radio Wave Propagation And Ionospheric GPS L1 Pseudorange Correction”, Proceedings of the 32nd Asian Conference on Remote Sensing (2011)
Galvez, M.C.D., E.P. Macalalad, E. A. Vallar, “Retrieval Of Boundary Layer And Cloud Base Heights In Manila From A Two-Wavelength Lidar Measurement”, Proceedings of the 32nd Asian Conference on Remote Sensing (2011)
Vallar, E., E. Macalalad, M. Lajara, M.C. Galvez, “Atmospheric Turbidity Measurements Using A 355nm-532nm Lidar And A Sunphotometer In Manila, Philippines”, Proceedings of the 32nd Asian Conference on Remote Sensing (2011)
Vallar, E. A., Galvez, M. C. D., Uy, J. C. Q., Macalalad, E. P., Roman, T. A., Bangsal, E. B., "Multi-instrument particulate matter characterization during the 2004 new year celebration in Manila (14°33.978' N; 120°59.523' E)" Proceedings from 22nd International Laser Radar Conference (ILRC 2004), European Space Agency, (Special Publication) ESA SP (2004)
Galvez, M. C. D., Vallar, E. A., Bangsal, E. B., Macalalad, E. P., and Roman, T. A., "Multi-Angle LIDAR Sensing of Traffic Aerosol in Manila" Proceedings from 22nd International Laser Radar Conference (ILRC 2004), European Space Agency, (Special Publication) ESA SP (2004)
Workshop Materials
| space_weather_visualization_workshop_files.7z |
| read_imf_dscovr.exe |
| read_solarwind_from_dscovr.exe |
| readglobaltecmap.exe |
