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Digital Facsimile (DIFAX) weather charts available on SKYTAP(tm) are updated continuously on Marta Systems' servers, in real-time as they are generated by the NOAA/NWS, and can be accessed via high-speed Internet connection.
 
Marta Systems maintains redundant DIFAX servers to provide real-time access to the charts via Internet connectivity at up to T1 (1.54Mbit/sec) speed.
 
Marta Systems' SKYTAP Graphics Weather Software (Windows2000 & XP) is required to access the DIFAX products and display the charts on personal computer systems. SKYTAP Graphics Weather Software automatically retrieves the charts at operator specified intervals, and only downloads those operator specified charts which have been updated since the last retrieval to provide faster and more efficient chart updates.
 
Chart Identification Chart Description
   N00E000K    NGM39 00hr 850Mb 00hr Fcst Temp, Ht, Wind
   N00E012K    NGM39 00hr 850Mb 12hr Fcst Temp, Ht, Wind
   N00E024K    NGM39 00hr 850Mb 24hr Fcst Temp, Ht, Wind
   N00E036K    NGM39 00hr 850Mb 36hr Fcst Temp, Ht, Wind
   N00E048K    NGM39 00hr 850Mb 48hr Fcst Temp, Ht, Wind
   N00H000J    NGM39 00hr 700Mb 00hr Fcst Rh, Ht, Wind
   N00H012J    NGM39 00hr 700Mb 12hr Fcst Rh, Ht, Wind
   N00H024J    NGM39 00hr 700Mb 24hr Fcst Rh, Ht, Wind
   N00H036J    NGM39 00hr 700Mb 36hr Fcst Rh, Ht, Wind
   N00H048J    NGM39 00hr 700Mb 48hr Fcst Rh, Ht, Wind
   N00L000H    NGM39 00hr 500mb 00hr Fcst Vort, Ht, Wind
   N00L012H    NGM39 00hr 500mb 12hr Fcst Vort, Ht, Wind
   N00L024H    NGM39 00hr 500mb 24hr Fcst Vort, Ht, Wind
   N00L036H    NGM39 00hr 500mb 36hr Fcst Vort, Ht, Wind
   N00L048H    NGM39 00hr 500mb 48hr Fcst Vort, Ht, Wind
   N00X000R    NGM39 00hr 1000-500mb MSLP 00hr Fcst 06hr Total PCPN
   N00X012R    NGM39 00hr 1000-500mb MSLP 12hr Fcst 06hr Total PCPN
   N00X024R    NGM39 00hr 1000-500mb MSLP 24hr Fcst 06hr Total PCPN
   N00X036R    NGM39 00hr 1000-500mb MSLP 36hr Fcst 06hr Total PCPN
   N00X048R    NGM39 00hr 1000-500mb MSLP 48hr Fcst 06hr Total PCPN
   N12E000K    NGM39 12hr 850Mb 00hr Fcst Temp, Ht, Wind
   N12E012K    NGM39 12hr 850Mb 12hr Fcst Temp, Ht, Wind
   N12E024K    NGM39 12hr 850Mb 24hr Fcst Temp, Ht, Wind
   N12E036K    NGM39 12hr 850Mb 36hr Fcst Temp, Ht, Wind
   N12E048K    NGM39 12hr 850Mb 48hr Fcst Temp, Ht, Wind
   N12H000J    NGM39 12hr 700Mb 00hr Fcst Rh, Ht, Wind
   N12H012J    NGM39 12hr 700Mb 12hr Fcst Rh, Ht, Wind
   N12H024J*    NGM39 12hr 700Mb 24hr Fcst Rh, Ht, Wind
   N12H036J    NGM39 12hr 700Mb 36hr Fcst Rh, Ht, Wind
   N12H048J    NGM39 12hr 700Mb 48hr Fcst Rh, Ht, Wind
   N12L000H    NGM39 12hr 500mb 00hr Fcst Vort, Ht, Wind
   N12L012H    NGM39 12hr 500mb 12hr Fcst Vort, Ht, Wind
   N12L024H    NGM39 12hr 500mb 24hr Fcst Vort, Ht, Wind
   N12L036H    NGM39 12hr 500mb 36hr Fcst Vort, Ht, Wind
   N12L048H    NGM39 12hr 500mb 48hr Fcst Vort, Ht, Wind
   N12X000R    NGM39 12hr 1000-500mb MSLP 00hr Fcst 06hr Total PCPN
   N12X012R    NGM39 12hr 1000-500mb MSLP 12hr Fcst 06hr Total PCPN
   N12X024R    NGM39 12hr 1000-500mb MSLP 24hr Fcst 06hr Total PCPN
   N12X036R    NGM39 12hr 1000-500mb MSLP 36hr Fcst 06hr Total PCPN
   N12X048R    NGM39 12hr 1000-500mb MSLP 48hr Fcst 06hr Total PCPN
   PHBE10    VOLCANIC ASH WATCH/WARNING 24hr
   PHBI10    VOLCANIC ASH WATCH/WARNING 24hr
   PTBA89    SATELLITE-DERIVED SST ANALYSIS DEG-C
   PWBI98    48HR SFC FCST
   PWCE25    WORLD AREA FCST FL340 WINDS TEMPS
   PWGD25    WORLD AREA FCST FL340 WINDS TEMPS 12hr
   PYAA00    SFC ANAL ATL
   PYPA00    SFC ANAL PAC
   QAUA00    RADAR SUMMARY
   QDTM85  SFC FCST 48-HR ATL
   QESA00    PRECIP WATER ANALYSIS - CONUS
   QESC00    6HR QPF - CONUS
   QETA00    OBSERVED 24HR PRECIP
   QETI00

   24HR QPF - CONUS

   QGUA00    WX DEPICTION
   QHFQ50    48HR FCST 500-600 HT/VORT
   QHQA17    GFS 200MB ANALYSIS STREAMLINES ISOTACHS DATA
   QHTAO7    700MB ANALYSIS HT/TEMPS
   QHTA11    500MB ANALYSIS HT/TEMPS
   QHUA04    850MB ANALYSIS HT/TEMPS
   QHUA15    3000MB ANALYSIS HT/ISOTACHS
   QHUI48    24/36HR FCST 500MB FCST HT/VORT
   QHUI49    00/12HR FCST 500MB FCST HT/VORT
   QHUM83    36/48HR FCST 850MB ANALYSIS HT/TEMPS
   QHUM84    12/24HR FCST 850MB ANALYSIS HT/TEMPS
   QHUQ00    36HR FCST FRONTS PRESSURE WX
    QJAA88    WIND AND WAVES
   QPAA99    SRFC PRESSURE ANALYSIS ATL
   QPUO00    DAY 1-5 MOS MEAN MAX TEMOP ANOMALY
   QPUT88    6-10 DAY OUTLOOK TEMP PROBABILITY
   QRUA00    AVG SRFC-500MB RH
   QSTA00    OBSERVED SNOW COVER
   QTMI00    DAY-1 MIN TEMP ANOMALY
   QTMI01    DAY-3 MIN TEMP ANOMALY
   QTTA00    MAX PAST 12HR TEMPS
   QTTA01    MIN PAST 12HR TEMPS
   QTUA11    00UTC 00HR FCST N-HEMI POLAR
   QUNA00    GFS 850MB ANALYSIS
   QWAA00    TROP SRFC ANAL AND CYCLONE INFO
   QWAE60    GFS 850MB ANALYSIS STREAMLONES ISOTACHS DATA
   QWBA20    GFS 2000MB PAC ANALYSIS
   QWBA85    GFS 850MB PAC ANALYSIS STREAMLONES ISOTACHS DATA
    QWBI99    24HR FCST OCEAN SRFC WINDS/WAVE HGTS
   QWBQ99    48HR FCST OCEAN SRFC WINDS/WAVE HGTS
   QWFI99    24HR FCST 1000MB STREAMS ISOTACHS
   QWFQ99    48HR FCST 1000MB STREAMS ISOTACHS
   QWQA00    EAST TRP SRFC ANALYSIS
   QWTA16    SRFC/600/400/250 WINDS/TMPS
   QXUA00    LIFTED INDEX ANALYSIS
   QYAA00    0600 SRFC ANALYSIS - CONUS
   QYBA00    0600 SRFC ANALYSIS - NORTH AMER
   QYFA99    PAC TROP SRFC ANALYSIS
   QYSA00    FREEZING LEVEL ANALYSIS
   QZQA07    0HR OBS 700MB STREAMS / ISOTACHS
   QZQA11    0HR OBS 500MB STREAMS / ISOTACHS
   QZQA16    0HR OBS 250MB STREAMS / ISOTACHS
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