Optional second pin. Independent screen — not a comparison.
Optical-clear · cloud ≤
and precipitation = 0
Ka-open · rain < mm
Ka-heavy-fade · rain ≥ mm · risk count
Modeled · ERA5 reanalysis · Open-Meteo
No series yet. Enter a point and Go. Open-Meteo ERA5 is fetched in the browser — this page never invents hours.
Pin A · independent screen
—
Optical hours / year
—
All 24h ERA5 hours, including daylight. Not photometric night.
—
Ka-open hours / year
—
Rain below the open threshold. Not an availability SLA.
—
Ka heavy-fade hours
Risk count · not subtracted twice
Hours with rain at or above the heavy threshold. Separate from Ka-open.
Modeled vapor hint — not a score
—
Median total-column water vapour in Ka-open hours. Reanalysis, not a link budget.
Hours by month · share of resolved hours
OpticalKa-open
Pin B · independent screen
—
Optical hours / year
—
All 24h ERA5 hours, including daylight. Not photometric night.
—
Ka-open hours / year
—
Rain below the open threshold. Not an availability SLA.
—
Ka heavy-fade hours
Risk count · not subtracted twice
Hours with rain at or above the heavy threshold. Separate from Ka-open.
Modeled vapor hint — not a score
—
Median total-column water vapour in Ka-open hours. Reanalysis, not a link budget.
Screening-grade public reanalysis.
Not a link budget. Not underwriting. Not operational weather.
Not computed: radio-quiet, elevation mask, ITU-R P.618 rain fade, aerosols — nor seeing, Strehl, dB fade, photometric night, or an availability SLA.
Optical hours default to 24h ERA5 hours (cloud and precip), including daylight. Optional night-only is MODELED sun elevation < −0.833° at the ERA5 cell — not photometric night.
Cloud and rain are ERA5 grid-cell hourly fields, not a telescope or terminal at a pad.
Cloud is an instant cell fraction; rain/precip are the preceding-hour sum.
This fetch uses Open-Meteo’s public non-commercial API. Weather data by Open-Meteo.com