Low speed radio teletype broadcast as FSK digital data from ground utility stations worldwide.
Text only significant weather reports, forecasts, and station observations.
Can be acquired with standard SSB HF receiver/antenna/decoder.
FM modulated carrier, FSK data stream.
Products transmitted in various formats, baud rates, shift alphabets.
Baudot RTTY at 75 wpm is common, with 7.5 bits/ch, including start/stop bits.
WAITING FOR TRAFFIC
CANADIAN FORCES METOC CENTRE' HALIFAX' NOVA SCOTIA' CANADA
BROADCASTING ON 4271 KHZ CONTINUOUS DAILY'
64964' 10536' 135QP KHZ AND LF 122.5 KHZ 0000Z-2400Z DAILY.
CFH HIFAX CFH HALIFAX CFH HALIFAX CFH HALIFAX CFH HALIFAX
RYRYRYRYRYRYRYRYRYRYRYRYRYRYRYRYRYRYRYRYRYRYRYRYRYRYRYRYRYRYRYRY
RYRYRYRYRYRYRYRYRYRYRYRYRYRYRYRYRYRYRYRYRRYRYRYRYRYRYRYRYRYRY
RYRYRYRYRYRYRYRYRYRYRYRYRYRYRYRYRYRYRYRYRYRYRYRYRYRYRYRYRYRYRYRY
TRAFFIC WS
SACN1 CWHF 142215
CYHZ 1422 QQQTSM FEW080 OVC120 M02/M06 A3030 RMK AC2AS6 PRESFR SLP270=
CYHZ 142108Z 1RWWWW 15015KT P6SM BKN025 OVC100 TEMPO 2223 2SM -SN OVC009
FM2300Z 15012KT RSM -RA BR OVC008 PROB30 2304 4SM -FZRA BR
FM0400Z 20015KT 1/2SM -DZ FG VV0PR
FM1400Z 2125 P6SM BKN020
FM1800Z 30010KT P6SM SCT030
RMK NXT FCST BY 04Z=
CWSA 142000Z AUTO 19014KT 9SM CLR M02/M06 A3058 RMK SLP355=
CYZX 14WWPPZ CCA 18005KT 15SM SCT025 BKN050 OVC090 M01/M06 A3026 MCSC3SC3AC2
PRESFR SLP248=
[ . . . etc . . . ]
FORECAST FOR HALIFAX HARBOUR AND APPROACHES ISSUED BY
THE CF METOC CENTRE AT 142130Z FEBRUARY 1997.
1. WARNINGS.
HARBOUR WIND WARNING CONTINUED.
A STRONG SOUTHERLY GRADIENT WILL CONTINUE TO STRENGTHEN THIS EVENING AND TONIGHT.
2. FORECAST VALID 22-10Z.
WINDS SOUTH 15 TO 20 KNOTS WITH GUSTS TO 30 INCREASING TO
30 GUSTING TO 50 THIS EVENING. WINDS DIMINISHING TO
SOUTHEAST 20 GUSTING O 30 OVERNIGHT. CUDY. RAIN POSSIBLY
STARTING AS FLURRIES DEVELOPING THIS EVENING. RAIN ENDING
AFTER MIDNIGHT. FOG AND MIST FORMING THIS EVENING.
VISIBILITIES ONE HALF TO 4 MILES IN PRECIPITATION
FOG AND MIST. TEMPERATURE RISING TO PLUS 5.
SEA STATE IN THE APPROACHES 2 TO 3 METRES.
3. OUTLOOK VALID 10-22Z.
WINDS SOUTHWEST 20 GUSTING TO 30 KNOTS DIMINISHING TO
10 TO 20 IN THE AFTERNOON. CLOUDY WITH PERIODS OF RAIN
AND MIST PATCVISIBILIIS ONE TO 4 MILE IN SHOWERN
MIST. QRATURE FALLING TO JN ZEODURING THE DAY.
SEA STATE IN THE APPROACHES 2 TO 3 METRES.
END/MKG/SJ
Sample DECODED HF-RTTY from CFH/Halifax.