Critical frequency (English Wikipedia)

Analysis of information sources in references of the Wikipedia article "Critical frequency" in English language version.

Last modified: 00:27:38, 17 February 2026 (UTC)

Ref.Un. Ref.Website

Global rank English rank

21rfwireless-world.com

low place

low place

low place

low place

1,099^th place

630^th place

11adsabs.harvard.edu

14^th place

9^th place

2^nd place

2^nd place

4^th place

4^th place

1,891^st place

1,068^th place

11ghostarchive.org

64^th place

28^th place

adsabs.harvard.edu (Global: 14^th place; English: 9^th place)

ui.adsabs.harvard.edu

Theimer, Otto; Taylor, Leonard S. (October 1961). "On the index of refraction in the ionosphere". Journal of Geophysical Research. 66 (10): 3157–3162. Bibcode:1961JGR....66.3157T. doi:10.1029/jz066i010p03157. ISSN 0148-0227.

bldrdoc.gov (Global: low place; English: low place)

its.bldrdoc.gov

"Definition: critical frequency". www.its.bldrdoc.gov. Retrieved 2018-09-13.

bom.gov.au (Global: 1,891^st place; English: 1,068^th place)

sws.bom.gov.au

"HF radio propagation" (PDF). Space Weather Services. Archived (PDF) from the original on 2022-10-09.

doi.org (Global: 2^nd place; English: 2^nd place)

Theimer, Otto; Taylor, Leonard S. (October 1961). "On the index of refraction in the ionosphere". Journal of Geophysical Research. 66 (10): 3157–3162. Bibcode:1961JGR....66.3157T. doi:10.1029/jz066i010p03157. ISSN 0148-0227.

ghostarchive.org (Global: 64^th place; English: 28^th place)

"HF radio propagation" (PDF). Space Weather Services. Archived (PDF) from the original on 2022-10-09.

rfwireless-world.com (Global: low place; English: low place)

"CF vs MUF | Difference between CF and MUF". www.rfwireless-world.com. Retrieved 2018-09-13.

ucsb.edu (Global: 1,099^th place; English: 630^th place)

scienceline.ucsb.edu

"UCSB Science Line". scienceline.ucsb.edu. Retrieved 2018-09-14.

worldcat.org (Global: 4^th place; English: 4^th place)

search.worldcat.org

Theimer, Otto; Taylor, Leonard S. (October 1961). "On the index of refraction in the ionosphere". Journal of Geophysical Research. 66 (10): 3157–3162. Bibcode:1961JGR....66.3157T. doi:10.1029/jz066i010p03157. ISSN 0148-0227.