Garmin HTAWS User Guide - Page 22

XM Weather METARs Meteorological Aerodrome

Get Garmin HTAWS PDF manuals and user guides View all Garmin HTAWS manuals
Add to My Manuals
Save this manual to your list of manuals

Page 22 highlights

Part Two: Section 2 XM Weather XM Weather Label and NEXRAD Source U.S. XM Weather Label and NEXRAD Source Canada NOTE: The only weather product available for Canada is Canadian NEXRAD. NEXRAD Limitations Certain limitations exist regarding the NEXRAD radar displays. Some, but not all, are listed for the user's awareness: • NEXRAD base reflectivity does not provide sufficient information to determine cloud layers or precipitation characteristics (hail vs. rain, etc). • NEXRAD base reflectivity is sampled at the minimum antenna elevation angle. An individual NEXRAD site cannot depict high altitude storms at close ranges, and has no information about storms directly over the site. • Neither NEXRAD weather data nor the age of the NEXRAD weather data are displayed at a zoom range of less than 10 NM. The resolution of displayed NEXRAD data is 2 kilometers. Therefore, when zoomed in on the display, each square block is 2 kilometers. The intensity level reflected by the square will be the highest level sampled within the 2 kilometer square area. XM Weather METARs XM Weather METARs (Meteorological Aerodrome Reports) are available on the XM Weather page. When enabled (that is, when "METAR" is shown in the upper left corner of the page), airports with METAR information above a certain severity level are marked with colored flags on the display. Refer to the XM Weather legend for a description of the color code. The update rate is every 12 minutes. 16 190-00356-30 Rev H

  • 1
  • 2
  • 3
  • 4
  • 5
  • 6
  • 7
  • 8
  • 9
  • 10
  • 11
  • 12
  • 13
  • 14
  • 15
  • 16
  • 17
  • 18
  • 19
  • 20
  • 21
  • 22
  • 23
  • 24
  • 25
  • 26
  • 27
  • 28
  • 29
  • 30
  • 31
  • 32
  • 33
  • 34
  • 35
  • 36
  • 37
  • 38
  • 39
  • 40
  • 41
  • 42
  • 43
  • 44
  • 45
  • 46
  • 47
  • 48
  • 49
  • 50
  • 51
  • 52
  • 53
  • 54
  • 55
  • 56
  • 57
  • 58
  • 59
  • 60
  • 61
  • 62
  • 63
  • 64
  • 65
  • 66
  • 67
  • 68
  • 69
  • 70
  • 71
  • 72
  • 73
  • 74
  • 75
  • 76
  • 77
  • 78
16
Part Two: Section 2
XM Weather
XM Weather Label
and NEXRAD Source
U.S.
XM Weather Label
and NEXRAD Source
Canada
NOTE
:
The only weather product available for Canada
is Canadian NEXRAD.
NEXRAD Limitations
Certain limitations exist regarding the NEXRAD
radar displays. Some, but not all, are listed for the
user’s awareness:
• NEXRAD base reflectivity
does not provide suf-
ficient information to determine cloud layers or
precipitation characteristics (hail vs. rain, etc).
• NEXRAD base reflectivity is sampled at the
minimum antenna elevation angle. An indi-
vidual NEXRAD site cannot depict high altitude
storms at close ranges, and has no information
about storms directly over the site.
• Neither NEXRAD weather data nor the age of
the NEXRAD weather data are displayed at a
zoom range of less than 10 NM. The resolu
-
tion of displayed NEXRAD data is 2 kilometers.
Therefore, when zoomed in on the
display,
each square block is 2 kilometers. The intensity
level reflected by the square will be the high-
est level sampled within the 2 kilometer square
area.
XM Weather METARs
XM Weather METARs (Meteorological Aerodrome
Reports) are available on the XM Weather page. When
enabled (that is, when “METAR” is shown in the upper
left corner of the page), airports with METAR infor
-
mation above a certain severity level are marked with
colored flags on the display. Refer to the XM Weather
legend for a description of the color code. The update
rate is every 12 minutes.
190-00356-30 Rev H