Standard refractive modulus gradient: Difference between revisions
Jump to navigation
Jump to search
m (1 revision) |
m (Dictionary clean-up: identifier → urn:mrn:iala:dic:4-1-0905) |
||
| (One intermediate revision by the same user not shown) | |||
| Line 1: | Line 1: | ||
'''4-1- | '''urn:mrn:iala:dic:4-1-0905''' | ||
Alternative term: Standard M gradient | Alternative term: Standard M gradient | ||
| Line 10: | Line 10: | ||
{{IALAFooter}} | {{IALAFooter}} | ||
{{languages|}} | {{languages|Standard refractive modulus gradient}} | ||
[[Category:4.1 General Terms]] | [[Category:4.1 General Terms]] | ||
[[Category:Alphabetical Index]] | [[Category:Alphabetical Index]] | ||
[[Category:IALA Dictionary 1970-89 Edition]] | [[Category:IALA Dictionary 1970-89 Edition]] | ||
Latest revision as of 10:01, 17 September 2026
Alternative term: Standard M gradient
That uniform variation of refractive modulus with height above the earth's surface which is regarded as a standard for comparison. The gradient considered as normal has a value of 0.12 M units per metre (3.6 M units per hundred feet).
Reference: C.C.I.R.
Please note that this is the term as it stands in the original IALA Dictionary edition (1970-1989)
