| Main |
Number
|
Title |
Status |
Questions |
P.1239-4 (08/2023)
|
ITU-R reference ionospheric characteristics
|
In force (Main)
|
212/3
|
|
| Previous versions |
Number
|
Title |
Status |
Questions |
P.1239-0 (05/97)
|
ITU-R Reference ionospheric characteristics
Note - This Recommendation replaces Rec. ITU-R P.434-6
|
Superseded
|
212/3, 223/3
|
P.1239-3 (02/2012)
|
ITU-R reference ionospheric characteristics
|
Superseded
|
212/3
|
P.1239-2 (10/2009)
|
ITU-R reference ionospheric characteristics
|
Superseded
|
212/3
|
P.1239-1 (02/2007)
|
ITU-R reference ionospheric characteristics
|
Superseded
|
212/3
|
