RED ARMY RADIOTELEGRAPH SIMULATOR

= Meteo Codes =

Meteo Codes simulated in RARS

CODE	REF	REMARKS
Aero Q codes coded weather		aero meteo waves on LF and rarely HF
China Code	[1]
F11	[1]
F13	[1]	not implemented yet
F111	[1]
FM21 (SHIP)	[3]	on vessel maritime bands
Italian Code	[1]	Naval stations, 1930s, MF+HF
Japan Code A	[2]	not implemented yet
SYNOP	[3]
Ukrainian Code	[2]	modified old international code

Fxxx codes were old international codes used widely and well described in [1][2].
New international codes can be found here: [3]

All codes are simulated in dynamical way, so all meteo data is generated in a random way, although I tried made it as within acceptable values.
I think this is better than static strings which are boring when receiving still and still same message.
For skeds see: Weather and Navigational Broadcasts

= Codes Structure =
- Observations from land stations -

F13, F11, F111
In these codes initial 3 groups are always the same, additional groups are added in F11 and F111.

F11: III wwVh DDFWN PPPTT Uapp

III	NOS
Cl	form of low clouds
Cm	form of middle clouds
ww	weather at time of observation and general character of weather
V	horizontal visibility	0-9 (2-6 used)
h	height of base of cloud	0-9 (2-7 used)
Nh	amount of clouds	0-9 (0-8 used)
DD	true direction of the wind near the ground
F	maximum wind force (Beaufort scale)	0-9 (2-7 used)
W	past weather	0-9 (0-3 used)
N	proportion of the sky covered
PPP	pressure in millibars. Initial 9 or 10 omited
TT	temperature	(minus if 50-99)
U	relative humidity
Ch	form of high clouds
a	characteristic of barometric tendency	0-9
pp

F13 (Aviation short code): III wwVh DDFWN

III	NOS
Cl	form of low clouds
Cm	form of middle clouds
ww	weather at time of observation and general character of weather
V	horizontal visibility	0-9 (2-6 used)
h	height of base of cloud	0-9 (2-7 used)
Nh	amount of clouds	0-9 (0-8 used)
DD	true direction of the wind near the ground
F	maximum wind force (Beaufort scale)	0-9 (3-6 used)
W	past weather	0-9 (0-3 used)
N	proportion of the sky covered

F111: III wwVh DDFWN PPPTT Uapp RRjjj

III	NOS
Cl	form of low clouds
Cm	form of middle clouds
ww	weather at time of observation and general character of weather
V	horizontal visibility	0-9 (2-6 used)
h	height of base of cloud	0-9 (2-7 used)
Nh	amount of clouds	0-9 (0-8 used)
DD	true direction of the wind near the ground
F	maximum wind force (Beaufort scale)	0-9 (2-7 used)
W	past weather	0-9 (0-3 used)
N	proportion of the sky covered
PPP	pressure in millibars. Initial 9 or 10 omited
TT	temperature	(minus if 50-99)
U	relative humidity
Ch	form of high clouds
a	characteristic of barometric tendency	0-9
pp
RR	amount of rainfall
jjj		(0-999 used)

CHINA CODE: II DDFww PPPTT

II	NOS
DD	true direction of the wind near the ground
F	maximum wind force (Beaufort scale)	0-9 (2-7 used)
ww	weather at time of observation and general character of weather
PPP	pressure in millibars. Initial 9 or 10 omited
TT	temperature	(minus if 50-99)

ITALIAN CODE: III PPaDF(SVs)wwX

III	NOS	3 letter code
PP	pressure in millibars. Initial 9 or 10 omited
a	characteristic of barometric tendency	0-9
D	true direction of the wind near the ground	0-9
F	maximum wind force (Beaufort scale)	0-9 (2-7 used)
S
Vs
ww	weather at time of observation and general character of weather	0-99
X	weather forecast	0-9,X

UKRAINIAN CODE

SOURCES:

[1] 1943 Radio Weather Aids To Navigation - Radio Weather Broadcasts, Notice to Mariners No.32 of 1943, USN Hydrographic Office
[2] Radio Aids To Navigation 1930, USN Hydrographic Office
[3] Manual on Codes, International Codes Volume I.1, Annex II to the WMO Technical Regulations, WMO-No. 306
[4] Radio Weather Aids H.O. Pub. No. 118

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