Articles | Volume 17, issue 9
https://doi.org/10.5194/amt-17-2811-2024
© Author(s) 2024. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/amt-17-2811-2024
© Author(s) 2024. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Research article
| 
08 May 2024
Research article |
| 08 May 2024
| 08 May 2024
Measuring rainfall using microwave links: the influence of temporal sampling
Luuk D. van der Valk
CORRESPONDING AUTHOR
Department of Water Management, Delft University of Technology, Delft, the Netherlands
Miriam Coenders-Gerrits
Department of Water Management, Delft University of Technology, Delft, the Netherlands
Rolf W. Hut
Department of Water Management, Delft University of Technology, Delft, the Netherlands
Aart Overeem
Department of Water Management, Delft University of Technology, Delft, the Netherlands
Royal Netherlands Meteorological Institute, De Bilt, the Netherlands
Bas Walraven
Department of Water Management, Delft University of Technology, Delft, the Netherlands
Remko Uijlenhoet
Department of Water Management, Delft University of Technology, Delft, the Netherlands
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Femke A. Jansen, Remko Uijlenhoet, Cor M. J. Jacobs, and Adriaan J. Teuling
Hydrol. Earth Syst. Sci., 26, 2875–2898, https://doi.org/10.5194/hess-26-2875-2022, https://doi.org/10.5194/hess-26-2875-2022, 2022
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Hydrol. Earth Syst. Sci. Discuss., https://doi.org/10.5194/hess-2022-114, https://doi.org/10.5194/hess-2022-114, 2022
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Hydrol. Earth Syst. Sci. Discuss., https://doi.org/10.5194/hess-2022-59, https://doi.org/10.5194/hess-2022-59, 2022
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Hydrol. Earth Syst. Sci., 26, 647–664, https://doi.org/10.5194/hess-26-647-2022, https://doi.org/10.5194/hess-26-647-2022, 2022
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Impactful open, accessible, reusable, and reproducible hydrologic research practices are being embraced by individuals and the community, but taking the plunge can seem overwhelming. We present the Open Hydrology Principles and Practical Guide to help hydrologists move toward open science, research, and education. We discuss the benefits and how hydrologists can overcome common challenges. We encourage all hydrologists to join the open science community (https://open-hydrology.github.io).
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Vassilis Aschonitis, Dimos Touloumidis, Marie-Claire ten Veldhuis, and Miriam Coenders-Gerrits
Earth Syst. Sci. Data, 14, 163–177, https://doi.org/10.5194/essd-14-163-2022, https://doi.org/10.5194/essd-14-163-2022, 2022
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This work provides a global database of correction coefficients for improving the performance of the temperature-based Thornthwaite potential evapotranspiration formula and aridity indices (e.g., UNEP, Thornthwaite) that make use of this formula. The coefficients were produced using as a benchmark the ASCE-standardized reference evapotranspiration formula (formerly FAO-56) that requires temperature, solar radiation, wind speed, and relative humidity data.
Markus Hrachowitz, Michael Stockinger, Miriam Coenders-Gerrits, Ruud van der Ent, Heye Bogena, Andreas Lücke, and Christine Stumpp
Hydrol. Earth Syst. Sci., 25, 4887–4915, https://doi.org/10.5194/hess-25-4887-2021, https://doi.org/10.5194/hess-25-4887-2021, 2021
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Deforestation affects how catchments store and release water. Here we found that deforestation in the study catchment led to a 20 % increase in mean runoff, while reducing the vegetation-accessible water storage from about 258 to 101 mm. As a consequence, fractions of young water in the stream increased by up to 25 % during wet periods. This implies that water and solutes are more rapidly routed to the stream, which can, after contamination, lead to increased contaminant peak concentrations.
Didier de Villiers, Marc Schleiss, Marie-Claire ten Veldhuis, Rolf Hut, and Nick van de Giesen
Atmos. Meas. Tech., 14, 5607–5623, https://doi.org/10.5194/amt-14-5607-2021, https://doi.org/10.5194/amt-14-5607-2021, 2021
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Ground-based rainfall observations across the African continent are sparse. We present a new and inexpensive rainfall measuring instrument (the intervalometer) and use it to derive reasonably accurate rainfall rates. These are dependent on a fundamental assumption that is widely used in parameterisations of the rain drop size distribution. This assumption is tested and found to not apply for most raindrops but is still useful in deriving rainfall rates. The intervalometer shows good potential.
Ruben Imhoff, Claudia Brauer, Klaas-Jan van Heeringen, Hidde Leijnse, Aart Overeem, Albrecht Weerts, and Remko Uijlenhoet
Hydrol. Earth Syst. Sci., 25, 4061–4080, https://doi.org/10.5194/hess-25-4061-2021, https://doi.org/10.5194/hess-25-4061-2021, 2021
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Simone Gelsinari, Valentijn R. N. Pauwels, Edoardo Daly, Jos van Dam, Remko Uijlenhoet, Nicholas Fewster-Young, and Rebecca Doble
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César Dionisio Jiménez-Rodríguez, Miriam Coenders-Gerrits, Bart Schilperoort, Adriana del Pilar González-Angarita, and Hubert Savenije
Hydrol. Earth Syst. Sci., 25, 619–635, https://doi.org/10.5194/hess-25-619-2021, https://doi.org/10.5194/hess-25-619-2021, 2021
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During rainfall events, evaporation from tropical forests is usually ignored. However, the water retained in the canopy during rainfall increases the evaporation despite the high-humidity conditions. In a tropical wet forest in Costa Rica, it was possible to depict vapor plumes rising from the forest canopy during rainfall. These plumes are evidence of forest evaporation. Also, we identified the conditions that allowed this phenomenon to happen using time-lapse videos and meteorological data.
Jolijn van Engelenburg, Erik van Slobbe, Adriaan J. Teuling, Remko Uijlenhoet, and Petra Hellegers
Drink. Water Eng. Sci., 14, 1–43, https://doi.org/10.5194/dwes-14-1-2021, https://doi.org/10.5194/dwes-14-1-2021, 2021
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This study analysed the impact of extreme weather events, water quality deterioration, and a growing drinking water demand on the sustainability of drinking water supply in the Netherlands. The results of the case studies were compared to sustainability issues for drinking water supply that are experienced worldwide. This resulted in a set of sustainability characteristics describing drinking water supply on a local scale in terms of hydrological, technical, and socio-economic characteristics.
Bart Schilperoort, Miriam Coenders-Gerrits, César Jiménez Rodríguez, Christiaan van der Tol, Bas van de Wiel, and Hubert Savenije
Biogeosciences, 17, 6423–6439, https://doi.org/10.5194/bg-17-6423-2020, https://doi.org/10.5194/bg-17-6423-2020, 2020
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With distributed temperature sensing (DTS) we measured a vertical temperature profile in a forest, from the forest floor to above the treetops. Using this temperature profile we can see which parts of the forest canopy are colder (thus more dense) or warmer (and less dense) and study the effect this has on the suppression of turbulent mixing. This can be used to improve our knowledge of the interaction between the atmosphere and forests and improve carbon dioxide flux measurements over forests.
Rolf Hut, Thanda Thatoe Nwe Win, and Thom Bogaard
Geosci. Instrum. Method. Data Syst., 9, 435–442, https://doi.org/10.5194/gi-9-435-2020, https://doi.org/10.5194/gi-9-435-2020, 2020
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GPS drifters that float down rivers are important tools in studying rivers, but they can be expensive. Recently, both GPS receivers and cellular modems have become available at lower prices to tinkering scientists due to the rise of open hardware and the Arduino. We provide detailed instructions on how to build a low-power GPS drifter with local storage and a cellular model that we tested in a fieldwork in Myanmar. These instructions allow fellow geoscientists to recreate the device.
Justus G. V. van Ramshorst, Miriam Coenders-Gerrits, Bart Schilperoort, Bas J. H. van de Wiel, Jonathan G. Izett, John S. Selker, Chad W. Higgins, Hubert H. G. Savenije, and Nick C. van de Giesen
Atmos. Meas. Tech., 13, 5423–5439, https://doi.org/10.5194/amt-13-5423-2020, https://doi.org/10.5194/amt-13-5423-2020, 2020
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In this work we present experimental results of a novel actively heated fiber-optic (AHFO) observational wind-probing technique. We utilized a controlled wind-tunnel setup to assess both the accuracy and precision of AHFO under a range of operational conditions (wind speed, angles of attack and temperature differences). AHFO has the potential to provide high-resolution distributed observations of wind speeds, allowing for better spatial characterization of fine-scale processes.
D. Alex R. Gordon, Miriam Coenders-Gerrits, Brent A. Sellers, S. M. Moein Sadeghi, and John T. Van Stan II
Hydrol. Earth Syst. Sci., 24, 4587–4599, https://doi.org/10.5194/hess-24-4587-2020, https://doi.org/10.5194/hess-24-4587-2020, 2020
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Where plants exist, rain must pass through canopies to reach soils. We studied how rain interacts with dogfennel – a highly problematic weed that is abundant in pastures, grasslands, rangelands, urban forests and along highways. Dogfennels evaporated large portions (approx. one-fifth) of rain and drained significant (at times > 25 %) rain (and dew) down their stems to their roots (via stemflow). This may explain how dogfennel survives and even invades managed landscapes during extended droughts.
Cited articles
ABI research: Wireless Backhaul Evolution Delivering Next-Generation Connectivity, GSMA, https://www.gsma.com/spectrum/wp-content/uploads/2022/04/wireless-backhaul-spectrum.pdf (last access: 30 January 2024), 2021. a
Atlas, D. and Ulbrich, C. W.: Path- and Area-Integrated Rainfall Measurement by Microwave Attenuation in the 1–3 cm Band, J. Appl. Meteorol. Clim., 16, 1322–1331, https://doi.org/10.1175/1520-0450(1977)016<1322:Paairm>2.0.Co;2, 1977. a
Berne, A. and Krajewski, W. F.: Radar for hydrology: Unfulfilled promise or unrecognized potential?, Adv. Water Resour., 51, 357–366, https://doi.org/10.1016/j.advwatres.2012.05.005, 2013. a
Berne, A. and Uijlenhoet, R.: Path-averaged rainfall estimation using microwave links: Uncertainty due to spatial rainfall variability, Geophys. Res. Lett., 34, L07403, https://doi.org/10.1029/2007gl029409, 2007. a, b
Berne, A., Delrieu, G., Creutin, J.-D., and Obled, C.: Temporal and spatial resolution of rainfall measurements required for urban hydrology, J. Hydrol., 299, 166–179, https://doi.org/10.1016/s0022-1694(04)00363-4, 2004. a, b
Brauer, C. C., Overeem, A., Leijnse, H., and Uijlenhoet, R.: The effect of differences between rainfall measurement techniques on groundwater and discharge simulations in a lowland catchment, Hydrol. Process., 30, 3885–3900, https://doi.org/10.1002/hyp.10898, 2016. a
Chwala, C. and Kunstmann, H.: Commercial microwave link networks for rainfall observation: Assessment of the current status and future challenges, WIREs Water, 6, e1337, https://doi.org/10.1002/wat2.1337, 2019. a, b, c, d
Chwala, C., Keis, F., and Kunstmann, H.: Real-time data acquisition of commercial microwave link networks for hydrometeorological applications, Atmos. Meas. Tech., 9, 991–999, https://doi.org/10.5194/amt-9-991-2016, 2016. a, b
Cristiano, E., ten Veldhuis, M.-C., and van de Giesen, N.: Spatial and temporal variability of rainfall and their effects on hydrological response in urban areas – a review, Hydrol. Earth Syst. Sci., 21, 3859–3878, https://doi.org/10.5194/hess-21-3859-2017, 2017. a
de Vos, L. W., Raupach, T. H., Leijnse, H., Overeem, A., Berne, A., and Uijlenhoet, R.: High‐Resolution Simulation Study Exploring the Potential of Radars, Crowdsourced Personal Weather Stations, and Commercial Microwave Links to Monitor Small‐Scale Urban Rainfall, Water Resour. Res., 54, 10293–10312, https://doi.org/10.1029/2018wr023393, 2018. a, b
de Vos, L. W., Overeem, A., Leijnse, H., and Uijlenhoet, R.: Rainfall Estimation Accuracy of a Nationwide Instantaneously Sampling Commercial Microwave Link Network: Error Dependency on Known Characteristics, J. Atmos. Ocean. Tech., 36, 1267–1283, https://doi.org/10.1175/jtech-d-18-0197.1, 2019. a
Fencl, M., Rieckermann, J., Schleiss, M., Stransky, D., and Bares, V.: Assessing the potential of using telecommunication microwave links in urban drainage modelling, Water Sci. Technol., 68, 1810–1818, https://doi.org/10.2166/wst.2013.429, 2013. a
Fencl, M., Valtr, P., Kvicera, M., and Bares, V.: Quantifying Wet Antenna Attenuation in 38-GHz Commercial Microwave Links of Cellular Backhaul, IEEE Geosci. Remote S., 16, 514–518, https://doi.org/10.1109/lgrs.2018.2876696, 2019. a
Graf, M., Chwala, C., Polz, J., and Kunstmann, H.: Rainfall estimation from a German-wide commercial microwave link network: optimized processing and validation for 1 year of data, Hydrol. Earth Syst. Sci., 24, 2931–2950, https://doi.org/10.5194/hess-24-2931-2020, 2020. a, b
Habi, H. V. and Messer, H.: Recurrent Neural Network for Rain Estimation Using Commercial Microwave Links, IEEE T. Geosci. Remote, 59, 3672–3681, https://doi.org/10.1109/tgrs.2020.3010305, 2021. a
Hoedjes, J., Kooiman, A., Maathuis, B., Said, M., Becht, R., Limo, A., Mumo, M., Nduhiu-Mathenge, J., Shaka, A., and Su, B.: A Conceptual Flash Flood Early Warning System for Africa, Based on Terrestrial Microwave Links and Flash Flood Guidance, ISPRS Int. J. Geo-Inf., 3, 584–598, https://doi.org/10.3390/ijgi3020584, 2014. a
Imhoff, R. O., Overeem, A., Brauer, C. C., Leijnse, H., Weerts, A. H., and Uijlenhoet, R.: Rainfall Nowcasting Using Commercial Microwave Links, Geophys. Res. Lett., 47, e2020GL089365, https://doi.org/10.1029/2020gl089365, 2020. a
Jameson, A.: A Comparison of Microwave Techniques for Measuring Rainfall, J. Appl. Meteorol., 30, 32–54, https://doi.org/10.1175/1520-0450(1991)030<0032:ACOMTF>2.0.CO;2, 1991. a
Kharadly, M. M. Z. and Ross, R.: Effect of wet antenna attenuation on propagation data statistics, IEEE T. Antenn. Propag., 49, 1183–1191, https://doi.org/10.1109/8.943313, 2001. a
Leijnse, H., Uijlenhoet, R., and Stricker, J. N. M.: Hydrometeorological application of a microwave link: 2. Precipitation, Water Resour. Res., 43, W04417, https://doi.org/10.1029/2006wr004989, 2007a. a
Leijnse, H., Uijlenhoet, R., and Stricker, J. N. M.: Rainfall measurement using radio links from cellular communication networks, Water Resour. Res., 43, W03201, https://doi.org/10.1029/2006wr005631, 2007b. a, b
Leijnse, H., Uijlenhoet, R., and Stricker, J. N. M.: Microwave link rainfall estimation: Effects of link length and frequency, temporal sampling, power resolution, and wet antenna attenuation, Adv. Water Resour., 31, 1481–1493, https://doi.org/10.1016/j.advwatres.2008.03.004, 2008. a, b, c, d, e, f, g, h, i
Maggioni, V., Meyers, P. C., and Robinson, M. D.: A Review of Merged High-Resolution Satellite Precipitation Product Accuracy during the Tropical Rainfall Measuring Mission (TRMM) Era, J. Hydrometeorol., 17, 1101–1117, https://doi.org/10.1175/jhm-d-15-0190.1, 2018. a, b
Messer, H. and Sendik, O.: A New Approach to Precipitation Monitoring: A critical survey of existing technologies and challenges, IEEE Signal Proc. Mag., 32, 110–122, https://doi.org/10.1109/msp.2014.2309705, 2015. a
Messer, H., Zinevich, A., and Alpert, P.: Environmental monitoring by wireless communication networks, Science, 312, 713, https://doi.org/10.1126/science.1120034, 2006. a, b
Minda, H. and Nakamura, K.: High Temporal Resolution Path-Average Rain Gauge with 50-GHz Band Microwave, J. Atmos. Ocean. Tech., 22, 165–179, https://doi.org/10.1175/JTECH-1683.1, 2005. a
Molden, D.: Water for food water for life: A comprehensive assessment of water management in agriculture, Routledge, ISBN 1849773793, 2013. a
NASA: What Determines the Latency of IMERG?, NASA, https://gpm.nasa.gov/resources/faq/what-determines-latency-imerg (last access: 24 January 2024), 2024. a
Niemczynowicz, J.: The rainfall movement – A valuable complement to short-term rainfall data, J. Hydrol., 104, 311–326, https://doi.org/10.1016/0022-1694(88)90172-2, 1988. a
Olsen, R., Rogers, D., and Hodge, D.: The aRbrelation in the calculation of rain attenuation, IEEE T. Antenn. Propag., 26, 318–329, https://doi.org/10.1109/TAP.1978.1141845, 1978. a
Ostrometzky, J., Eshel, A., Alpert, P., and Messer, H.: Induced bias in attenuation measurements taken from commercial microwave links, in: 2017 IEEE Int. Conf. Acoust. Spee. (ICASSP), 3744–3748, https://doi.org/10.1109/ICASSP.2017.7952856, ISBN 2379-190X, 2017. a
Overeem, A., Leijnse, H., and Uijlenhoet, R.: Measuring urban rainfall using microwave links from commercial cellular communication networks, Water Resour. Res., 47, W12505, https://doi.org/10.1029/2010wr010350, 2011. a, b, c, d
Overeem, A., Leijnse, H., and Uijlenhoet, R.: Country-wide rainfall maps from cellular communication networks, P. Natl. Acad. Sci. USA, 110, 2741–2745, https://doi.org/10.1073/pnas.1217961110, 2013. a
Overeem, A., Leijnse, H., and Uijlenhoet, R.: Retrieval algorithm for rainfall mapping from microwave links in a cellular communication network, Atmos. Meas. Tech., 9, 2425–2444, https://doi.org/10.5194/amt-9-2425-2016, 2016a. a, b, c, d
Overeem, A., Leijnse, H., and Uijlenhoet, R.: Two and a half years of country-wide rainfall maps using radio links from commercial cellular telecommunication networks, Water Resour. Res., 52, 8039–8065, https://doi.org/10.1002/2016wr019412, 2016b. a
Overeem, A., Leijnse, H., van Leth, T. C., Bogerd, L., Priebe, J., Tricarico, D., Droste, A., and Uijlenhoet, R.: Tropical rainfall monitoring with commercial microwave links in Sri Lanka, Environ. Res. Lett., 16, 074058, https://doi.org/10.1088/1748-9326/ac0fa6, 2021. a
Pastorek, J., Fencl, M., Rieckermann, J., and Bareš, V.: Precipitation Estimates From Commercial Microwave Links: Practical Approaches to Wet-Antenna Correction, IEEE T. Geosci. Remote, 60, 1–9, https://doi.org/10.1109/TGRS.2021.3110004, 2022. a
Pastorek, J., Fencl, M., and Bareš, V.: Uncertainties in discharge predictions based on microwave link rainfall estimates in a small urban catchment, J. Hydrol., 617, 129051, https://doi.org/10.1016/j.jhydrol.2022.129051, 2023. a
Pollock, M. D., O'Donnell, G., Quinn, P., Dutton, M., Black, A., Wilkinson, M. E., Colli, M., Stagnaro, M., Lanza, L. G., Lewis, E., Kilsby, C. G., and O'Connell, P. E.: Quantifying and Mitigating Wind‐Induced Undercatch in Rainfall Measurements, Water Resour. Res., 54, 3863–3875, https://doi.org/10.1029/2017wr022421, 2018. a
Pudashine, J., Guyot, A., Overeem, A., Pauwels, V. R. N., Seed, A., Uijlenhoet, R., Prakash, M., and Walker, J. P.: Rainfall retrieval using commercial microwave links: Effect of sampling strategy on retrieval accuracy, J. Hydrol., 603, 126909, https://doi.org/10.1016/j.jhydrol.2021.126909, 2021. a
Raupach, T. H. and Berne, A.: Correction of raindrop size distributions measured by Parsivel disdrometers, using a two-dimensional video disdrometer as a reference, Atmos. Meas. Tech., 8, 343–365, https://doi.org/10.5194/amt-8-343-2015, 2015. a, b
Rios Gaona, M. F., Overeem, A., Brasjen, A. M., Meirink, J. F., Leijnse, H., and Uijlenhoet, R.: Evaluation of rainfall products derived from satellites and microwave links for the Netherlands, IEEE T. Geosci. Remote, 55, 6849–6859, https://doi.org/10.1109/tgrs.2017.2735439, 2017. a
Schleiss, M., Rieckermann, J., and Berne, A.: Quantification and Modeling of Wet-Antenna Attenuation for Commercial Microwave Links, IEEE Geosci. Remote S., 10, 1195–1199, https://doi.org/10.1109/lgrs.2012.2236074, 2013. a, b
Sun, Q., Miao, C., Duan, Q., Ashouri, H., Sorooshian, S., and Hsu, K.: A Review of Global Precipitation Data Sets: Data Sources, Estimation, and Intercomparisons, Rev. Geophys., 56, 79–107, https://doi.org/10.1002/2017rg000574, 2018. a
Uijlenhoet, R., Overeem, A., and Leijnse, H.: Opportunistic remote sensing of rainfall using microwave links from cellular communication networks, WIREs Water, 5, e1289, https://doi.org/10.1002/wat2.1289, 2018. a
van het Schip, T. I., Overeem, A., Leijnse, H., Uijlenhoet, R., Meirink, J. F., and van Delden, A. J.: Rainfall measurement using cell phone links: classification of wet and dry periods using geostationary satellites, Hydrolog. Sci. J., 62, 1343–1353, https://doi.org/10.1080/02626667.2017.1329588, 2017. a
van Leth, T. C., Overeem, A., Uijlenhoet, R., and Leijnse, H.: Wageningen Urban Rainfall experiment, Version 1, 4TU.ResearchData [data set], https://doi.org/10.4121/uuid:1dd45123-c732-4390-9fe4-6e09b578d4ff, 2018b. a
Wessels, H. R. A.: Metingen van regendruppels te De Bilt, scientific report WR 72-6, KNMI, De Bilt, http://publicaties.minienm.nl/download-bijlage/7976/metingen-van-regendruppels-te-de-bilt.pdf (last access: 30 April 2024), 1972 (in Dutch). a
Zinevich, A., Messer, H., and Alpert, P.: Prediction of rainfall intensity measurement errors using commercial microwave communication links, Atmos. Meas. Tech., 3, 1385–1402, https://doi.org/10.5194/amt-3-1385-2010, 2010. a
Short summary
Microwave links, often part of mobile phone networks, can be used to measure rainfall along the link path by determining the signal loss caused by rainfall. We use high-frequency data of multiple microwave links to recreate commonly used sampling strategies. For time intervals up to 1 min, the influence of sampling strategies on estimated rainfall intensities is relatively little, while for intervals longer than 5–15 min, the sampling strategy can have significant influences on the estimates.
Microwave links, often part of mobile phone networks, can be used to measure rainfall along the...
