Tomorrow Companies: NGSO Uplinks in W Band Pose Weather Observation Threat
Expanded uplink allocations for non-geostationary orbit broadband in parts of the W band represent a serious interference risk to scientific and weather forecasting interests, including the Tomorrow Companies' own earth observation work, according to the satellite operator. In a docket…
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25-180 filing posted Friday, Tomorrow said data from the 90-92 GHz and 115-122 GHz passive bands is hugely important to weather prediction and storm structure analysis, and those measurements can't be done in another swath of spectrum. Low-level out-of-band emissions from NGSO uplinks could mimic natural atmospheric signals, it said. Tomorrow urged "strict, enforceable" limits on such emissions and "sufficient separation" between uplink allocations and passive science bands. The FCC adopted a Further NPRM in May asking about opening parts of the W band to satellite communications (see 2505280055).