Precipitation Occurrence Sensor System (POSS) - HTML from https://open.canada.ca/data/en/dataset/c916c624-20c8-480b-ac86-2fb3ccc654da

The Precipitation Occurrence Sensor System (POSS) is a small X-band 10.525 GHz continuous-wave bi-static vertically pointing Doppler radar. The system reports precipitation occurrence, type and intensity of precipitation at 1-min temporal resolution. Raw measurements are 960 samples per minute. Doppler velocity and return power of hydrometeors intersect the sensing volume near and up to about 3 m above the sensor head.

Post-processing of the spectral data produces a results file containing derived precipitation rate and radar reflectivity, for both liquid and solid precipitation assumptions, at 1-minute temporal resolution.

The minutely POSS precipitation rates are estimated using two different methods. The “mass flux (MF) method” is for liquid precipitation. The “regression method” or “Z-R method” is used by large-scale precipitation radars where there is a relationship (regression) between radar reflectivity (Z) and precipitation rate (R).

POSS units have been deployed at a number of sites worldwide. Datasets are listed as follows,

1) YEU, 2007-07-28 to 2020-03-01 - Eureka, Nunavut, Canada.

2) GNL, 2010-09-15 to 2020-05-01 - Summit Station, Greenland Ice Sheet.

3) CAR, 2011-01-01 to 2019-08-23 - Egbert, Ontario, Canada.

4) YYZ, 2013-06-11 to 2019-05-23 - Toronto Pearson Int. Airport, Ontario, Canada.

5) JAR, 2010-09-17 to 2011-04-20 - Jarvenpaa (40 km N of Helsinki), Finland.

6) EMA, 2010-09-18 to 2010-10-22 - Emasalo (50 km E of Helsinki), Finland.

Champ	Valeur
Dernière modification de la donnée	16 janvier 2026
Dernière modification de la métadonnée	16 janvier 2026
Créé le	16 janvier 2026
Format	HTML
Licence	License not specified
Datastore active	False
Has views	False
Id	5142111a-280a-435d-b98f-ed573359b177
Package id	f3cda93d-2298-4a66-a72c-1c94238bc59e
Position	0
State	active

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