Welcome to horo.ch

Should you be interested in working with the data yourself, the data sets for each individual year are here at your disposal. The topic «FITS Data» describes the data format. You can find out how reliable and complete the data sets are by reading the topics «Station», «Location» and «Reliability».

1993
Dataset 10,153 bytes.

1994
Dataset 60,570 bytes.

1995
Dataset 68,370 bytes.

1996
Dataset 68,558 bytes.

1997
Dataset 69,759 bytes.

1998
Dataset 63,777 bytes.

1999
Dataset 47,491 bytes.

2000
Dataset 78,585 bytes.

2001
Dataset 92,086 bytes.

2002
Dataset 57,568 bytes.

2003
Dataset 91,780 bytes.

2004
Dataset 89,793 bytes.

2005
Dataset 88,369 bytes.

2006
Dataset 85,263 bytes.

2007
Dataset 86,505 bytes.

2008
Dataset 84,172 bytes.

2009
Dataset 79,806 bytes.

2010
Dataset 72,942 bytes.

2011
Dataset 77,904 bytes.

2012
Dataset 80,157 bytes.

2013
Dataset 80,031 bytes.

2014
Dataset 76,528 bytes.

2015
Dataset 74,473 bytes.

2016
Dataset 74,189 bytes.

2017
Dataset 72,600 bytes.

2018
Dataset 71,730 bytes.

2019
Dataset 70,656 bytes.

2020
Dataset 69,693 bytes.

2021
Dataset 69,657 bytes.

2022
Dataset 67,930 bytes.

2023
Dataset 65,653 bytes.

2024
Dataset 65,672 bytes.

One measured value from a probe is stored encoded as a byte (8 bits). The byte value 255 is to be considered invalid. Even though the information about decoding the byte value to the physical probe value is noted within the FITS file header, it is summerised here for your convenience.

Barometer: Byte-value + 870 = hPa, resolution 1 hPa.
Temperature: (Byte-value / 2) - 50 = °C, resolution ½°C.
Humidity: Byte-value / 2 = %, resolution ½%.
Wind speed: Byte-value = km/h, resolution = 1 km/h.
Wind direction: Byte-value x 22.5 = °, resolution 1/16 full circle, 22.5°.

The byte-value 0 is ambiguous. It may mean, no measurement taken or the measured value is zero (e.g. wind speed). Wind direction 0 also means north.