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Line 6: |
Line 6: |
| * [[ICAO HF Aeronautical Stations|MWARA frequencies]] - Aircraft use these stations to communicate over water when out of VHF radio range. | | * [[ICAO HF Aeronautical Stations|MWARA frequencies]] - Aircraft use these stations to communicate over water when out of VHF radio range. |
| * [http://www.hfunderground.com/wiki/MWARA MWARA Frequency map on HFunderground] | | * [http://www.hfunderground.com/wiki/MWARA MWARA Frequency map on HFunderground] |
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− | ==VOLMET==
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− | VOLMET, or meteorological information for aircraft in flight, is the term applied to a worldwide network of radio stations that broadcast TAF, SIGMET and METAR reports on shortwave frequencies. Reports are sent using automated voice transmissions, in the upper sideband or J3E mode. As the name suggests, pilots on international air routes use these transmissions to determine what procedures to use for descent, approach, and landing, such as a visual approach or an instrument approach and the correct STAR. The actual term comes from the contraction of 2 French words, loosely translated as 'Flying Weather'.
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− | The VOLMET network divides the world into specific regions, and individual VOLMET stations in each region broadcast weather reports for specific groups of air terminals in their region at specific times, coordinating their transmission schedules so as not to interfere with one another. Schedules are determined in intervals of five minutes, with one VOLMET station in each region broadcasting reports for a fixed list of cities in each interval. These schedules repeat every hour.
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− |
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− | === Use for Propagation ===
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− | VOLMET Broadcasts are great for propagation measuring, since they have set schedules and frequencies all over the world and can give an clear indication of when propagation is strong or weak in areas.
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− |
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− | === VOLMET Station Frequencies and Times ===
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− | ANCHORAGE
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− | 2863, 6679, 8828, 13282
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− | H+25-30 & H+55-00
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− | ANDERSEN
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− | 18002 2200-0700Z
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− | 13201 2000-0900Z
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− | 11176 H24
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− | 8967 H24
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− | 6738 0700-2200Z
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− | 4721 0900-2000Z
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− | H+15 & H+45
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− |
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− | ASUNCION
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− | 5601 0905-2315Z
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− | 10067
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− | H+05
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− | H+15
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− |
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− | AUCKLAND
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− | 6679 H24
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− | 8828 H24
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− | 13282 H24
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− | H+20+H-25
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− | BANGKOK
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− | 11387 2310-1145Z
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− | 6676 H24
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− | H+10-15 & H+40-45
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− | BANGKOK INTL
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− | 2965 1210-2245Z
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− | H+10-15 & H+40-45
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− |
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− | BEIJING
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− | *13285 0000-1600Z
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− | *8849
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− | **5673
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− | **3458
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− | H+15 - H+20
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− | H+45 - H+50
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− | *Day
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− | **Ngt
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− |
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− | BEIRUT
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− | 3001 H24
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− | 5561 H24
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− | H+15 & H+45
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− |
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− | BRAZZAVILLE*
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− | 10057 0700-2000Z H+00 & H+25
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− | 10057 2000-0700Z H+30 & H+55
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− | *English and French language
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− | CALCUTTA
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− | 11387 H24
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− | 6676 (0300-1300Z)
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− | 2965 (1300-0300Z)
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− | H+05-10 & H+35-40
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− | COMODORO RIVADAVIA RADIO
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− | 4675 0900-2400Z
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− | 8938 0900-2400Z
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− | H+30 & H+40
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− | CORDOBA RADIO
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− | 5475 H24 H+25
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− | 8952 H24 H+25
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− | DAMASCUS
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− | 2992 H24
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− | 5667 H24
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− | 8918 H24
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− | 13312 H24
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− | H+30 & Special
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− | H+00 & Special
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− | H+00 & Special
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− | EDMONTON MILITARY
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− | 6753 2300-1200Z EVEN HRS+20
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− | 15035 1200-2300Z, ODD HRS+20
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− |
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− | EZEIZA RADIO
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− | 2881 H24
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− | 5601 H24
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− | 11369 H24
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− | H+15 & H+01
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− |
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− | GANDER
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− | 3485 H24 H+20-25
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− | 6604 H24
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− | 10051 H24 H+25-30
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− | 13270 H24 H+50-55 & H+55-60
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− |
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− | HONG KONG
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− | 2863 H24 H+15-20
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− | 6679 H+45-50
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− | 8828
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− | 13282
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− |
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− | HONOLULU
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− | 2863 H24 H+00-05
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− | 6679 H24 H+30-35
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− | 8828 H24
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− | 13282 H24 H+05-10 & H+35-40
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− | H+25-30 & H+55-60
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− |
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− | KARACHI
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− | 6680 H24
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− | 3432 1500-0130Z
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− | 10017 0130-1500Z
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− | H+15 & H+45
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− |
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− | LAJES
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− | 13244 1000-2100Z
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− | 8967 H24
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− | 6750 H24
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− | H+00 & H+30
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− | 8070 1015-2315 H+15
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− |
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− | MACDILL
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− | 18019 0900-2400Z
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− | 13244 0900-2400Z
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− | 11246 H24
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− | 8993 H24
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− | 6750 0001-0900Z
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− | 4746 0001-0900Z
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− | H+15 & H+45
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− |
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− | MONTEVIDEO
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− | 8873 1000-2100Z H+15 AFST CARRASCO INTL.
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− | 5451
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− | 11387 H24
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− | 6676 H24
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− | 2965
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− | H+25-30 & H+55-00
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− |
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− | NEW YORK
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− | 3485 H24
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− | 6604 H24
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− | H+00-05
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− | 10051 H24
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− | 13270 H24 H+05-20 & H+30-50
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− | OAKLAND
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− | 2863 H24 H+05-10
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− | 6679 H24 H+35-40
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− | 8828 H24
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− | 13282 H24
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− | RESISTENCIA RADIO
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− | 4675 H24 H+20 & H+50
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− | ROYAL AIR FORCE
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− | 5450 H24
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− | 11253 H24
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− | Broadcast of airfields is twice an hour in slot times
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− | allotted as follows: 00/30, 06/36, 12/42, 18/48, 24/54
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− |
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− | SALTA RADIO
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− | 5475 H24 H+15 & H+45
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− |
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− | SHANNON
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− | 3413 SS-SR H+00
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− | 8957 H24
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− | 5505 H24
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− | 13264 SR-SS
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− | H+05, H+10, H+15, H+20, H+30, H+35, H+40, H+45, H+50
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− |
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− | SINGAPORE
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− | 6676 1230-2230Z
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− | 11387 2230-1230Z
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− | H+20 & H+50
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− |
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− | SYDNEY
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− | 6676 H24
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− | 11387 H24
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− | H+00 & H+30
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− |
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− | TAIWAN
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− | 2880 H24
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− | 5010 H+07
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− | 12400
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− | TRENTON (MILITARY)
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− | 15034 1000-0000Z
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− | 6754 2300-1100Z
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− | H+10-15, H+15-20, H+20-25, H+25-30
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− |
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− | TOKYO
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− | 2863 H24
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− | 6679 H+10-15 & H+40-45
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− | 8828
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− | 13282
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− | YOKOTA
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− | 18002 0001-0800Z
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− | 13201 2100-1000Z
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− | 11236 H24
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− | 8967 H24
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− | 6738 0800-2400Z
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− | 4747 1000-2100Z
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− | H+00 & H+30
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− |
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− | [[Category:Aircraft Monitoring]]
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− | [[Category:HF Topics]]
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