# Available enf signal databases

### United Kingdom
https://www.nationalgrideso.com/balancing-services/frequency-response-services/historic-frequency-data

https://data.nationalgrideso.com/system/system-frequency-data

https://gridwatch.co.uk/frequency - actual grid frequency

https://www.dynamicdemand.co.uk/grid.htm# - actual grid frequency

### USA
FNET - not known if data are publicly available, but probably available by requests

http://fnetpublic.utk.edu/index.html

https://github.com/LRydin/Power-Grid-Frequency

### Nordic grid - Finnland, Sweden, Norway, Island
https://data.fingrid.fi/en/dataset/frequency-historical-data

https://osf.io/86naf/

### Continental Europe - UCTE
https://osf.io/by5hu/wiki/home/ 

https://arxiv.org/pdf/2006.01771.pdf - osf data description

https://www.mainsfrequency.com/index.htm - actual grid frequency

https://www.swissgrid.ch/de/home/operation/regulation/frequency.html - actual grid frequency

https://github.com/LRydin/Power-Grid-Frequency

### Grid radar
Restricted free access. Similar location like osf data.

https://service.gridradar.net/index.php?menu=doc#examples

### Countries list and their grid frequency
https://www.generatorsource.com/Voltages_and_Hz_by_Country.aspx

https://en.wikipedia.org/wiki/Mains_electricity_by_country