Radar altimeter (English Wikipedia)

Analysis of information sources in references of the Wikipedia article "Radar altimeter" in English language version.

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2web.archive.org

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2americanradiohistory.com

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2storage.googleapis.com

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americanradiohistory.com (Global: 841^st place; English: 481^st place)

Bell 1948, p. 18. "Historic Firsts: Radio Altimeter" (PDF). Bell Labs: 18–19. January 1948.
Bell 1948, p. 19. "Historic Firsts: Radio Altimeter" (PDF). Bell Labs: 18–19. January 1948.

archive.org (Global: 6^th place; English: 6^th place)

Middleton, W E Knowles (1981). Radar Development in Canada: The Radio Branch of the National Research Council. Wilfrid Laurier University Press. p. 96. ISBN 9780889201064.

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

Espenschied & Newhouse 1939, pp. 225–227. Espenschied, Lloyd; Newhouse, Russell (January 1939). "A Terrain Clearance Indicator". The Bell System Technical Journal. 18 (1): 222–234. doi:10.1002/j.1538-7305.1939.tb00813.x.
Espenschied & Newhouse 1939, p. 227. Espenschied, Lloyd; Newhouse, Russell (January 1939). "A Terrain Clearance Indicator". The Bell System Technical Journal. 18 (1): 222–234. doi:10.1002/j.1538-7305.1939.tb00813.x.
Colin 1967, p. 737. Colin, Robert (July 1967). "1967 Pioneer Award: Lloyd Espenschied and Russell C. Newhouse". IEEE Transactions on Aerospace and Electronic Systems. AES-3 (4): 736–742. doi:10.1109/TAES.1967.5408855.
Colin 1967, p. 741. Colin, Robert (July 1967). "1967 Pioneer Award: Lloyd Espenschied and Russell C. Newhouse". IEEE Transactions on Aerospace and Electronic Systems. AES-3 (4): 736–742. doi:10.1109/TAES.1967.5408855.
Espenschied & Newhouse 1939, p. 224. Espenschied, Lloyd; Newhouse, Russell (January 1939). "A Terrain Clearance Indicator". The Bell System Technical Journal. 18 (1): 222–234. doi:10.1002/j.1538-7305.1939.tb00813.x.
Colin 1967, p. 742. Colin, Robert (July 1967). "1967 Pioneer Award: Lloyd Espenschied and Russell C. Newhouse". IEEE Transactions on Aerospace and Electronic Systems. AES-3 (4): 736–742. doi:10.1109/TAES.1967.5408855.
Espenschied & Newhouse 1939, p. 232. Espenschied, Lloyd; Newhouse, Russell (January 1939). "A Terrain Clearance Indicator". The Bell System Technical Journal. 18 (1): 222–234. doi:10.1002/j.1538-7305.1939.tb00813.x.

eeweb.com (Global: low place; English: low place)

Cody Miller. "A Radio Altimeter for Landing UAVs or Small Aircraft" Archived 2014-02-04 at the Wayback Machine. 2010.

faa.gov (Global: 1,009^th place; English: 607^th place)

"Chapter 5. Flight Instruments". Instrument Flying Handbook (PDF) (FAA-H-8083-15B ed.). Federal Aviation Administration Flight Standards Service. 2012. p. 29.

fcc.gov (Global: 1,271^st place; English: 703^rd place)

apps.fcc.gov

"COMMENTS OF AVIATION SPECTRUM RESOURCES, INC." Archived 2014-02-02 at the Wayback Machine. p. 3, p. 8.

itu.int (Global: 986^th place; English: 803^rd place)

"RECOMMENDATION ITU-R RS.1624 (PDF)" (PDF).

storage.googleapis.com (Global: 5,609^th place; English: 3,891^st place)

patentimages.storage.googleapis.com

US Expired 1517549, Lloyd Espenschied, "Railway Signal System", issued 1924-12-02
US Expired 2045071, Lloyd Espenschied, "Altimeter for aircraft", issued 1936-06-23

web.archive.org (Global: 1^st place; English: 1^st place)

"COMMENTS OF AVIATION SPECTRUM RESOURCES, INC." Archived 2014-02-02 at the Wayback Machine. p. 3, p. 8.
Cody Miller. "A Radio Altimeter for Landing UAVs or Small Aircraft" Archived 2014-02-04 at the Wayback Machine. 2010.