Io credo che il calcolo lo faccia la console e non la ISS. Almeno, di solito è così, nei dati catturati dai vari decodificatori dei sensori che trasmettono via radio non mi è mai capitato di vedere la trasmissione del dato orario ma semplicemente dell'evento della basculata.
Magari la ISS fa diversamente.
Ho trovato questo nel manuale dei calcoli derivati: (APP NOTES) 28: Derived Variables in Davis Weather Products - Davis Instruments Support, FAQs and Troubleshooting
RAINFALL RATE
Parameters Used: Rain Total (Rain rate is a measured variable in the sense that it is measured by the ISS
and transmitted to the display console, whereas all other calculated variables are determined by the
console from data received from the ISS.)
Formula:
Under normal conditions, rain rate data is sent with a nominal interval of 10 to 12 seconds. Every time a
rain tip or click occurs, a new rain rate value is computed (from the timer values) and the rate timers are
reset to zero.
Rain rate is calculated based on the time between successive tips of the rain collector. The rain rate value
is the highest rate since the last transmitted rain rate data packet. (Under most conditions, however, a rain
tip will not occur every 10 to 12 seconds.)
If there have been no rain tips since the last rain rate data transmission, then the rain rate based on the
time since that last tip is indicated. This results in slowly decaying rate values as a rainstorm ends, instead
of showing a rain rate which abruptly drops to zero. This results in a more realistic representation of the
actual rain event.
If this time exceeds roughly 15 minutes, then the rain rate value is reset to zero. This period of time was
chosen because 15 minutes is defined by the U.S. National Weather Service as intervening time upon
which one rain "event" is considered separate from another rain "event". This is also the shortest period
of time that the Umbrella will be seen on the display console after the onset of rain.
Stazione Davis Vantage Pro 2 -> Osservazioni meteo-climatiche: https://linktr.ee/meteopreonzo
Segnalibri