A Measurement of Excess Antenna Temperature at 4080 Mc/s
The Astrophysical Journal, 1965 · paper · Physics
Reports measurements with a 20-foot horn-reflector antenna at 4080 Mc/s that gave an effective zenith noise temperature about 3.5 K higher than expected. The excess appears isotropic, unpolarized and free of seasonal variation.
Checked: PDF from articles.adsabs.harvard.edu, fetched 4 Oct 2026. Page numbers are those of that PDF.
0 findings
None that passed a second check.
1 minor (typos and the like; most checked by the judge only)
Typo Inconsistent hyphenation of one term: "The backlobe response to ground radiation is taken to be less than 0.1° K" versus "back-lobe response", "average back-lobe level", "a back-lobe level", "lower back-lobe level" elsewhere on the same page.
- p. 2 Paragraph beginning 'The backlobe response to ground radiation'
The backlobe response to ground radiation is taken to be less than 0.1° K
- p. 2 Second paragraph of page (and three more times in the back-lobe paragraph)
antenna and back-lobe response is 0.9° K
- p. 2 paragraph 2
back-lobe response is 0.9° K
- p. 2 paragraph 5
computed to be 0.8° ± 0.4° K
Judge's note: On the page 2 image, "backlobe" is printed closed and mid-line, with no line-break hyphen, while the other four occurrences are hyphenated. This is a cosmetic inconsistency only. The numeric part of the cluster (0.9 K versus 0.8 K) is not a defect: 0.9° K is stated for "ohmic losses in the antenna and back-lobe response" combined, and the later text gives ohmic losses as 0.8° ± 0.4° K and back-lobe as less than 0.1° K, which together give about 0.9. The budget 6.7 - 2.3 - 0.9 reproduces the printed 3.5° K. Only the hyphenation point is confirmed.
Second check: none (judge only)