About: http://webisa.webdatacommons.org/29483545

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	In general, when the 11-year sunspot cycle is at its peak, higher frequencies such as the 19 MHz band can send a signal the farthest during the daytime; while when we are at a sunspot minimum, the 5 MHz band is the best during nighttime.
http://www.w3.org/ns/prov#wasQuotedFrom	radioworld.com