{"uid":"cap_8fdxgjkpfN84wq-j_Wv-z","slug":"itu-r-p-838-specific-rain-attenuation-calculator-b344d5bc","name":"ITU-R P.838 Specific Rain Attenuation Calculator","description":"Evaluate the frequency and polarization dependent specific rain attenuation model.","url":"https://detect.halowerk.com/v1/F-TD2000-GEO-INDUSTRY-B007/itu-p838-specific-rain-attenuation-frequency-polarization?utm_source=zero.xyz","method":"POST","headers":{},"bodySchema":{"type":"object","properties":{"artifact":{"type":"object","required":["rain"],"properties":{"rain":{"type":"object","required":["data","claim"],"properties":{"data":{"type":"object","required":["frequency_ghz","elevation_degrees","polarization_tilt_degrees","rain_rates"],"properties":{"rain_rates":{"type":"array","items":{"type":"number","maximum":500,"minimum":0},"maxItems":32,"minItems":1},"frequency_ghz":{"type":"number","maximum":1000,"minimum":1},"elevation_degrees":{"type":"number","maximum":90,"minimum":0},"polarization_tilt_degrees":{"type":"number","maximum":90,"minimum":-90}},"additionalProperties":false},"claim":{}},"additionalProperties":false}},"additionalProperties":false}}},"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.003","displayCostAsset":"USDC","priceDynamic":false,"priceHint":null,"priceStatus":"priced","priceSource":"probe","requiresHandshake":false,"reviewCount":0,"rating":{"score":"0.00","successRate":"0.00","reviews":0,"stars":null,"state":"unrated"},"availabilityStatus":"unknown","priceObserved":null,"sessionDeposit":null,"pricing":{"kind":"static","summary":"$0.003/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.003","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.003","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_pCGRVOqWYdKB9jskF0kFU","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.003","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Computes frequency- and polarization-dependent specific rain attenuation (dB/km) using the ITU-R P.838 model for given rain rates, frequency, elevation, and polarization tilt.","exampleAgentPrompt":"Can you calculate the specific rain attenuation using the ITU-R P.838 model for a 20 GHz vertically polarized signal (polarization tilt 90 degrees) at 40 degrees elevation, for rain rates of 1, 5, 10, 25, 50, and 100 mm/hr?","exampleUseCases":[{"title":"Satellite link rain fade margin sizing","prompt":"I'm designing a Ku-band GEO satellite downlink at 12 GHz with 30-degree elevation and horizontal polarization (tilt 0 degrees). Can you compute the ITU-R P.838 specific rain attenuation for rain rates of 5, 10, 25, 50, and 100 mm/hr so I can size my rain fade margin?"},{"title":"Ka-band fixed wireless rain loss study","prompt":"For a Ka-band point-to-point microwave link running at 28 GHz, 45-degree elevation, and 45-degree polarization tilt, what does the ITU-R P.838 model give me for specific rain attenuation across rain rates of 1, 2, 5, 10, 20, 50 mm/hr?"},{"title":"Tropical rainfall attenuation planning","prompt":"I need to model rain attenuation for a tropical region where rain rates can hit 200 mm/hr. Can you evaluate the ITU-R P.838 specific attenuation for a 38 GHz link at 25-degree elevation with vertical polarization (tilt 90 degrees) for rain rates of 50, 100, 150, 200, and 250 mm/hr?"}],"resultDescription":"Returns the computed specific rain attenuation values (in dB/km) corresponding to each supplied rain rate, calculated per the ITU-R P.838 frequency- and polarization-dependent model, accounting for the given frequency, elevation angle, and polarization tilt angle.","failureModes":["Frequency outside 1–1000 GHz range returns validation error","Elevation angle outside 0–90 degrees returns schema validation failure","Polarization tilt outside -90 to 90 degrees returns rejection","Rain rate values exceeding 500 mm/hr or array exceeding 32 items returns input error","Missing required fields (frequency, elevation, polarization_tilt, rain_rates) returns 400 bad request","Payment not included or insufficient USDC causes 402 Payment Required"],"whenToPreferThis":"Use this endpoint when you need a standards-compliant implementation of the ITU-R P.838 specific rain attenuation model for link budget calculations in satellite, GEO, or fixed wireless microwave systems — especially when you need to evaluate attenuation across a range of rain rates or polarizations simultaneously. It is ideal for automating rain fade margin calculations in engineering workflows without maintaining your own ITU model implementation.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-11-04T06:41:22.345Z","isFirstParty":false,"canonicalSlug":"itu-r-p-838-specific-rain-attenuation-calculator-b344d5bc"}