MADIS Surface Variables - HCN - Numeric
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Code Name Units Max Notes Database
QC Level FSL AWIPS*
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ELEV elevation m 0 X
LAT latitude deg N 0 X
LON longitude deg E 0 X
PLATTYP data platform type code 0 6 X
T air temperature K 3 4 X
ARCHVT archived temperature K 3 4 X
TV virtual temperature K 3 4,6 X
FF wind speed m/s 3 X
DD wind direction deg 3 5 X
U u wind component m/s 3 5 X
V v wind component m/s 3 5 X
DDGUST wind dir at gust deg 1 6 X
FFGUST wind gust m/s 2 6 X
DDSTDEV wind speed std dev for hour deg X
PCPRATE precipitation rate kg/(m**2)/s 1 7 X
PCP5M accumulated precip - 5m m 1 6 X
PCP24H accumulated precip - 24h m 1 6 X
RAWPATB raw precip accumulation m X
ARCHPCP 1h archived precip accumulation m 1 X
VIBWD1 vibrating wire depth - 1 mm 0 X
VIBWD2 vibrating wire depth - 2 mm 0 X
VIBWD3 vibrating wire depth - 3 mm 0 X
WETSEN1 wetness sensor 1 mm X
WETSEN2 wetness sensor 2 mm X
RAWTS1 raw temperature - sensor 1 K X
RAWTS2 raw temperature - sensor 2 K X
RAWTS3 raw temperature - sensor 3 K X
RTMNH1 raw temp min for hr - sensor 1 K X
RTMNH2 raw temp min for hr - sensor 2 K X
RTMNH3 raw temp min for hr - sensor 3 K X
RTMXH1 raw temp max for hr - sensor 1 K X
RTMXH2 raw temp max for hr - sensor 2 K X
RTMXH3 raw temp max for hr - sensor 3 K X
RTSDH1 raw temp std dev for hr - sensor 1 K X
RTSDH2 raw temp std dev for hr - sensor 2 K X
RTSDH3 raw temp std dev for hr - sensor 3 K X
FANSPD1 avg fan speed for hour - fan 1 rps X
FANSPD2 avg fan speed for hour - fan 2 rps X
LOGBATV data logger battery volt volt X
DOORMIN num minutes logger door open - hr minute X
XVOLT xmit pwr supply volt for full load volt X
INMAXT inlet max temperature K X
REFRAV reference resistor average - hr K X
DLSIG data logger signature X
XPWRFWD transmitter power forward X
XPWRREF transmitter power reflected X
DOORIND door open/close indicator code X
HEATIND rim heating on/off indicator code X
XERRIND transmit error indicator code X
PCPTOTL total precipitation m 0 6,30 X
MADIS Surface Variables - COOP - Character
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Code Name Character Notes Database
Size FSL AWIPS*
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STALOC station location 51 21 X
Notes (for all surface datasets)
--------------------------------
1. Dewpoint temperature and/or relative humidity are the moisture variables
stored in the database. The user can select either of these variables, or
select dewpoint depression, specific humidity, absolute humidity, or water
vapor mixing ratio which will then be calculated by the MADIS API. If
available, the stage 3 QC results from the dewpoint variable will be used
for any of the calculated variables. If this isn't available, the QC
results from the stored RH variable will be used. Also note that pressure
is needed for the absolute humidity conversion; for the COOP dataset this is
done by using the U.S. Standard Atmosphere calculation to calculate pressure
from station elevation.
2. As altimeter and station pressure can be calculated from each
other, for datasets without altimeter (MARITIME) the altimeter
will be calculated by the MADIS API, and for datasets without
station pressure (METAR, SAO, High Frequency METAR) that variable
will be calculated as well. With the MESONET dataset, if the
stored variable isn't the one requested by the user for each
particular station, the calculated value will be returned. In all
cases, the stage 3 QC from the altimeter variable (if available)
will be applied.
3. The 3 hour pressure change value consists of the numeric pressure change
value, with a sign applied per the value in the character of 3h pressure
change variable. The latter variable is coded:
Value Meaning
----- -------
0 pressure same or higher than 3 hours ago
1 increasing then steady
2 increasing
3 decreasing or steady, then increasing
4 steady
5 pressure same or lower than 3 hours ago
6 decreasing
7 steady or increasing, then decreasing
4. Air temperature is the temperature variable stored in the database. The user
can optionally select virtual temperature, which will then be calculated by
the MADIS API. The QC results from air temperature will apply in either
case. Also note that if virtual temperature cannot be calculated (missing
or bad dewpoint or pressure), and the air temperature passed all QC checks,
the air temperature will be returned instead, and a QC data descriptor value
of "T" will be assigned. As with the absolute humidity conversion mentioned
above, the virtual temperature conversion done for the COOP dataset uses
pressure calculated from the station elevation.
5. Wind speed and direction are reported and stored in the database. The user
can optionally select u & v wind components and those will be calculated and
returned. The QC results from speed and direction will be used In either
case, and if one of the map projections has been selected via the MSETDOM call,
the winds will be rotated to match the projection.
The documentation in the COOP cdl was changed to remove the height of the
anemometer. All anemometers are at 10 meters heights except for (GYX, TANM3,
and STYN6) which are at 3 meters.
6. Data platform type (MARITIME):
Value Meaning
----- -------
0 stationary (moored buoy or CMAN)
1 moving (drifting buoy or ship)
Data platform type (High Frequency METAR):
Value Meaning
----- -------
1 Federal ASOS
2 Federal AWOS
3 Federal AOS
4 Non-fed ASOS
5 Non-fed AWOS
6 Non-fed AOS
Data platform type (COOP):
Value Meaning
----- -------
< 100 Phase II site (regional hub)
100 Phase II site (GOES/HADS)
200 Phase I site (direct connect)
300 Phase I site (GOES/HADS)
The modernized NWS Cooperative Observer sites can provide different
variables, and on different schedules, dependent both on the type of site
(Phase I or II) and on the processing done as part of reformatting
the data sent over the various communications systems in use. Here are
the primary differences:
- Phase I sites only report a single temperature observation per hour,
valid at minute 0.
- Phase II GOES/HADS sites only report once per hour, but the reports
contain 5-minute observations from the last hour.
9/26/06: The Phase II GOES/HADS sites are being phased out, as part of
an upgrade where the COOP network has been gradually rolling in a new
software load over the last several months (and it's not done yet).
The new load is indicated in MADIS as data platform types 2-99 (currently
only 2 is in use). This upgrade has changed what variables are available from
the Phase II stations.
Variables that are no longer available for COOP PLATTYP 2 stations:
TD1H hourly average dewpoint temperature
RH relative humidity
RH1H hourly average relative humidity
Q specific humidity
Q1H hourly average specific humidity
DPD dewpoint depression
DPD1H hourly average dewpoint depression
AH absolute humidity
AH1H hourly average absolute humidity
WVMR water vapor mixing ratio
TV virtual temperature
T1H hourly average temperature
TV1H hourly average virtual temperature
DD1H hourly average wind direction
DD24H daily average wind direction
FF1H hourly average wind speed
FF24H daily average wind speed
U1H hourly average u wind component
U24H daily average u wind component
V1H hourly average v wind component
V24H daily average v wind component
PCPTOTL total precipitation
PCP1H accumulated precip - 1h
PCP24H accumulated precip - 24h
PCPUDAY accum. precip - user-defined day
UDSTART user-defined day start HHMM
PCPRATE precipitation rate
T24MIN 24 hour minimum temperature
T24MAX 24 hour maximum temperature
SOILM2 soil moisture percent - 2 inch
SOILM4 soil moisture percent - 4 inch
SOILM8 soil moisture percent - 8 inch
SOILM20 soil moisture percent - 20 inch
SOILM40 soil moisture percent - 40 inch
SOILT2 soil temperature - 2 inch
SOILT4 soil temperature - 4 inch
SOILT8 soil temperature - 8 inch
SOILT20 soil temperature - 20 inch
SOILT40 soil temperature - 40 inch
DDMAX1H wind dir at hourly max wind speed
FFMAX1H hourly maximum wind speed
GSRD5M global solar radiation - 5min
STNSPC1 station specific #1
STNSPC2 station specific #2
T24MINT time of 24 hour minimum temperature
T24MAXT time of 24 hour maximum temperature
Variables that have been added for COOP PLATTYP 2 stations:
DDGUST wind dir at gust (5m)
FFGUST wind gust (5m)
PCP5M accumulated precip - 5m
7. The user can select either accumulated precip - 1h or precipitation rate.
Whichever variable is actually stored in the MADIS database will be converted
to the form desired by the caller.
8. Precipitation intensity (MESONET):
Value Meaning
----- -------
0 intensity info not available
1 none
2 light
3 moderate
4 heavy
5 slight
6 other
Stations measuring precipitation type and intensity may take observations
with one or two sensors. Therefore, an array of 2 elements will be
returned for each record, and the caller should dimension the array to
(2,300000).
9. Precipitation type (MESONET):
Value Meaning
----- -------
0 no precipitation
1 precipitation present but unclassified
2 rain
3 snow
4 mixed rain and snow
5 light
6 light freezing
7 freezing rain
8 sleet
9 hail
10 other
11 unidentified
12 unknown
13 frozen
14 ice pellets
15 recent
29 RPU-to-maxSensor communications failure
30 sensor failure
Stations measuring precipitation type and intensity may take observations
with one or two sensors. Therefore, an array of 2 elements will be
returned for each record, and the caller should dimension the array to
(2,300000).
10. The sky cover variables (METAR, SAO, MESONET, High Frequency METAR)
can have up to 6 different layers (array elements) for each record.
The "sky cover layer base" variable is a number, so it should be
dimensioned to (6,300000) by the caller. The character "sky cover"
variable gives information about each layer reported in the sky cover
layer base variable, and has 8 characters for each of the 6 layers, so
it should be dimensioned character*8 skycover(6,300000). Note that
the High Frequency METAR dataset can only go up to 3 layers, and the SAO
dataset has a maximum of 5 layers, but to allow for mixing this data with
the other surface providers 6 layers (the last ones missing) will be
returned.
For more information on these variables, see section 9.4.2 of Federal
Meteorological Handbook 1 (FMH-1).
Sky cover values:
Value Meaning Summation amount of layer
----- ------- -------------------------
VV Vertical Visibility 8/8
SKC or CLR Clear 0
FEW Few 1/8 - 2/8
SCT Scattered 3/8 - 4/8
BKN Broken 5/8 - 7/8
OVC Overcast 8/8
1. CLR is used at automated stations when no layers at or below 12,000 ft
are reported; SKC is used at manual stations when no layers are
reported.
2. Any layer amount less than 1/8 is reported as FEW.
11. Height of the lowest cloud layer (MARITIME):
Value Meaning
----- -------
0 0 to 100 ft
1 200 to 300 ft
2 400 to 600 ft
3 700 to 900 ft
4 1000 to 1900 ft
5 2000 to 3200 ft
6 3300 to 4900 ft
7 5000 to 6500 ft
8 7000 to 8000 ft
9 8500 or higher or no clouds
-1 unknown or cloud base below surface of station
12. Low level cloud type (MARITIME):
Value Meaning
----- -------
0 no Cu, Cb, Sc, or St
1 Cu w/ little vertical extent
2 Cu w/ moderate or great vertical extent
3 Cb w/out fibrous or striated upper part
4 Sc formed by spreading Cu
5 Sc not formed by spreading Cu
6 St or ragged St
7 ragged St or ragged Cu
8 Cu and Sc w/ bases at different levels
9 Cb w/ fibrous or striated upper part
-1 low clouds not visible (obscured)
13. Middle level cloud type (MARITIME):
Value Meaning
----- -------
0 no Ac, As, or Ns
1 semi-transparent As
2 opaque As, or Ns
3 semi-transparent Ac predominant
4 Ac continually changing in appearance
5 Ac invading the sky
6 Ac formed by spreading of Cu or Cb
7 double layered Ac or thick Ac; or Ac & As
8 turreted Ac or Ac in tufts
9 Ac of a chaotic sky
-1 middle clouds not visible (obscured)
14. High level cloud type (MARITIME):
Value Meaning
----- -------
0 no Ci, Cs, or Cc
1 Ci in filaments or hooks
2 dense Ci & turreted Ci & Ci in tufts
3 dense Ci orig from Cb, present
4 Ci invading the sky
5 Cs not exceeding 45 degrees altitude
6 Cs exceeding 45 degrees altitude
7 Cs covering the whole sky
8 Cs not invading the sky
9 Cc alone, or Cc more than (Ci & Cs)
-1 high clouds not visible (obscured)
15. Tide indicator (MARITIME):
Value Meaning
----- -------
0 Data not available
1 Low tide, observed tide below predicted level
2 Low tide, observed tide same as predicted level
3 Low tide, observed tide above predicted level
4 Neither low nor high tide, observed tide below predicted level
5 Neither low nor high tide, observed tide same as predicted level
6 Neither low nor high tide, observed tide above predicted level
7 High tide, observed tide below predicted level
8 High tide, observed tide same as predicted level
9 High tide, observed tide above predicted level
16. The dewpoint & temperature from tenths of a deg C variables (METAR) are
decoded from the remarks section of the raw reports, for designated stations
only, and have values rounded to the nearest 0.1 degree C. The primary
temperature and dewpoint variables are reported from all stations, and in
the raw reports, are rounded to the nearest whole degree C.
17. Road state (MESONET):
Value Meaning
----- -------
0 No report
1 Dry
2 Moist
3 Moist and chemically treated
4 Wet
5 Wet and chemically treated
6 Ice
7 Frost
8 Snow
9 Snow/Ice watch
10 Snow/Ice warning
11 Wet above freezing
12 Wet below freezing
13 Absorption
14 Absorption at dewpoint
15 Dew
16 Black ice warning
17 Other
18 Slush
18. Automated station type (METAR, SAO):
Value Meaning
----- -------
AO1 automated station without precipitation discriminator (METAR)
AO2 automated station with precipitation discriminator (METAR)
AUTO2 automated station (SAO)
AUTO4 automated station (SAO)
AUTO7 automated station (SAO)
AUTO8 automated station (SAO)
blank manual station
19. Report type (METAR, SAO):
Value Meaning
----- -------
METAR scheduled report (METAR)
SPECI report triggered by SPECI criteria (METAR) (see FMH-1)
SA scheduled report (SAO)
20. The coded values for the present weather variable (METAR,
MARITIME, MESONET, High Frequency METAR) are too extensive to list
in this document. See FMH-1, particularly section 12.6.8.
The coded values for the COOP present weather variable are listed below:
Value Meaning
----- -------
- No report
FG Fog
IE Ice
GL Glaze
TS Thunder
GR Hail
DW Damaging Winds
RA Rainy
SN Snowy
21. The station location (METAR, MESONET, COOP) generally contains a geographic
description of the station's location, typically including the city, state,
and sometimes the country.
With the MESONET dataset, in addition, characters (40:50) are used to denote
the "subprovider", if any. Some (but not all) mesonets contain data from a
number of smaller networks. In these cases, the "subprovider" for each
station is the name of the smaller network. If this field is all blank, then
there isn't a subprovider associated with the station. This information can
also be obtained directly by reading the SUBPVDR variable, which only contains
the subprovider designation.
Note that the station location variable isn't available in the AWIPS database
for METAR.
22. The PCPUDAY (COOP) variable provides the accumulated precipitation for a
24 hour period that can be defined by each individual station. The UDSTART
variable can be used to determine the start hour & minute of the "user-defined
day". E.g., a UDSTART value of 1330 would mean the 24 hour accumulation
period starts at 13:30 local time, a value of 200 would represent 02:00.
23. The High Frequency METAR Runway Visual Range (RVRID) is specified
in degrees. The location of the RVR runway relative to other
parallel runways (RVRLOC) is specified as follows:
Value Meaning
----- -------
0 no runway parallel to RVR runway
1 left
2 center
3 right
The RVR distance type (RVRTYPE) variable has the following values:
Value Meaning
----- -------
0 between highest and lowest reportable values
1 lowest reportable value
2 highest reportable value
24. The High Frequency METAR alert data bitmasks (ALERT1, ALERT2) provide
an optional means to alert users to an operational value. This feature
is optional, and may not be implemented on all stations. The tables
below indicate the meaning of bits that may be set in the two words
(LSB=1, MSB=16).
ALERT1:
Bit Meaning
--- -------
1 Sky Condition, In
2 Ceiling, Up
3 Ceiling, Down
4 Visibility, Increase
5 Visibility, Decrease
6 Wind Direction/Preferred Runway Change
7 Wind Speed, Increase
8 Reserved
9 Hail, Begin
10 Hail, End
11 Ice Pellets, Begin
12 Ice Pellets, End
13 Freezing Rain, Begin
14 Freezing Rain, End
15 Freezing Drizzle, Begin
16 Freezing Drizzle, End
ALERT2:
Bit Meaning
--- -------
1 Thunderstorm, Begin
2 Thunderstorm, End
3 Thunderstorm, Increase
4 Tornado Observed
5 Funnel Cloud Observed
6 Water Spout Observed
7 Reserved
8 Local Threshold Exceeded
9 Snow, Begin
10 Snow, End
11 Rain, Begin
12 Rain, End
13 Non-specific Precip, Begin
14 Non-specific Precip, End
15 Fog, Begin
16 Fog, End
25. The COOP stations have the option to add up to two variables that are specific
to the individual station.
26. Commissioned status (COOP):
Value Meaning
----- -------
0 commissioned
1 not yet commissioned
27. Station quality indicator (COOP):
Value Meaning
----- -------
[TBD]
28. All times reported in the MADIS API are in Universal Coordinated Time, with the
format of "YYJJJHHMM", where:
YY = 2-digit year (good from 1980 - 2179)
JJJ = Julian date of the year (1-366)
HH = Hour (0-23)
MM = Minute (0-59)
If the max/min temperature time is missing, the 9-character field will be set to
all blanks, e.g., " ".
Users of the MADIS API sfcdump program will get the time output in their chosen
format, either YYJJJHHMM or YYYYMMDD_HHMM.
29. Some (but not all) mesonets, and the COOP dataset, contain data from a
number of smaller networks. In these cases, the "subprovider" for each
station is the name of the smaller network. If this variable is all blank, then
there isn't a subprovider associated with the station.
30. The total precipitation variable (COOP, MESONET, High Frequency
METAR) is an accumulation over a period of unknown duration.
Stations that report this value will also report the PCP1H and
PCP24H observations, except for High Frequency METAR, which will
report PCP1H but not PCP24H. The High Frequency total
precipitation values are only available for AWOS stations. The
PCPTOTL value is made available for those interested in
calculating the accumulation over a period of other than 1 or 24
hours.
31. The COOP door open/closed indicator is used to show when the instrument
enclosure has been opened for maintenance.
Value Meaning
----- -------
0 closed
1 open
32. The COOP rim heating on/off indicator is used to indicate when rim heating
is on for the precipitation gauge.
Value Meaning
----- -------
0 off
1 on
33. The stage 3 results from the 5m variables are also assigned to the
15m variables for UrbaNet.
34. The High Frequency METAR dataset contains the following "remarks" variables:
Automated remarks status (ARMKST) is a bitmask with set bits indicating
the detection of conditions triggering automated remarks (LSB=1, MSB=16):
Bit Meaning
--- -------
1 variable visibility
2 variable wind direction
3 variable ceiling
4 reserved
5 visibility at second location
6 ceiling height at second location
Automated remarks (AUTORMK) encoding
------------------------------------
Variable Visibility
The automated remark pertaining to variable visibility is
expressed as: VSBY aaa(a)Vbbb(b), where aaa(a) and bbb(b) are 3-
or 4-character, variable-length fields with leading "0" characters
as necessary to ensure a 3 character minimum, and these represent
range limits provided in hundredths of statute miles. For
example: VSBY 075V250 indicates a variation in visibility between
0.75 and 2.5 miles.
(ASOS/AOS Only) A multiple sensor visibility remark is inserted in
this field in the exact format by which it is prepared for
insertion as a multiple sensor visibility REMARK in METAR format.
See FMH-1 for details of the formatting.
Variable Wind
The automated remark for variable wind direction is encoded as
follows when the current average wind speed exceeds 6 knots:
WND ccVdd, where cc and dd are 2-character, fixed-length fields
with a leading "0" character as necessary, and indicates range
limits provided in tens of degrees. For example: WND 06V13 denotes
a variation in the true direction between 60 and 130 degrees.
The automated remark for variable wind direction is encoded as
follows when the current average wind speed is equal to or less
than 6 knots and five-second wind samples have varied over a range
of 60 degrees or more over the past two minutes: VRBkkKT, where kk
is a 2-character, fixed-length field with a leading "0" character,
and "VRB" and "KT" shall be literals. For example: VRB03KT
Variable Ceiling (ASOS/AOS Only)
The automated remark for variable ceiling condition may indicate
one (for an airport configured with a single cloud sensor) or one
of two (for an airport configured with multiple cloud sensors)
cloud conditions. The format for the single cloud sensor
configuration is: CIG eeeVfff, and the format for the multiple
cloud sensor configuration is:
CIG eee gggggggg
CIG eeeVfff
CHINO gggggggg
Upper case letters and blanks within individual remarks are
fixed. Lower case eee,fff are 3-character, fixed-length fields
with leading "0" character(s) as necessary, and respectively
represent minimum and maximum ceiling heights, in hundreds of
feet, above ground level (AGL).
gggggggg is a 1- to 8-character, variable-length field
representing one of the eight cardinal directions: "N", "NE", "E",
"SE", "S", "SW", "W", "NW" and/or additional descriptors such as
runway designators, etc.
For example: CIG 008V020 indicates that a variable ceiling base
height was detected between 800 and 2000 feet.
Visibility At Second Location (ASOS/AOS Only)
The automated remark pertaining to visibility at a second
location, generated only when this value is less than that
registered at the primary location, is encoded as:
VIS aaaaa gggggggg, where aaaaa is a variable length field of up
to 5 characters representing the visibility in fractional format,
with a single space character separating the integer and fractional
parts, and gggggggg is a 1- to 8-character, variable-length field
representing one of the eight cardinal directions: "N", "NE", "E",
"SE", "S", "SW", "W", "NW" and/or additional descriptors such as
runway designators, etc. For example: VIS 1 3/4 RWY22 indicates a
visibility of one and three quarters statute miles registered at
the Runway 22 location.
Ceiling Height At Second Location (ASOS/AOS Only)
The automated remark pertaining to ceiling height at a second
location, generated only when this value is less than that
registered at the primary location, is encoded as:
CIG hhh gggggggg, where hhh is a fixed length field of 3 characters
representing the measured ceiling height in hundreds of feet, and
gggggggg is a 1- to 8-character, variable-length field
representing one of the eight cardinal directions: "N", "NE", "E",
"SE", "S", "SW", "W", "NW" and/or additional descriptors such as
runway designators, etc. For example: CIG 003 RWY22 indicates a
ceiling height of three hundred feet registered at the Runway 22
location.
Operator remarks (OPERRMK) are free-formatted text.
35. The High Frequency METAR sensor status variables (DDSS, FFSS, FRZRSS,
PCPASS, PCPTSS, PSS, RVRSS, SCLBSS, TDSS, TSS, VISSS) indicate the
operational status of each sensor, as shown in the following table:
Value Meaning
----- -------
0 Sensor operating/data available
1 Reserved
2 Sensor not installed
3 Sensor out of service
4 Reserved
5 Sensors output in conflict
6 Invalidated: Auto range check
7 Invalidated: Auto rate of change
8 Invalidated: Auto insufficent count
9 Invalidated: By operator
10 Data source offsite: Link failure
11 Reserved
12 Dewpoint sensor invalidated *
13 Reserved
14 Reserved
15 Reserved
16 Operator manual data entry
* Value 12 is only used for the dewpoint sensor (TDSS).
36. The High Frequency METAR operating status (OPSTAT) is a bitmask indicating
the status of the station as a whole, the meaning of the possible set bits
(LSB=1, MSB=16) is shown below.
Bit Meaning
--- -------
1 Operator on duty
2 Test Mode
3 Manual Mode
4 Part or all data are suspect
37. The High Frequency METAR dataset parameter activation status (PARACT)
pertains to obstructions to visibility and precipitation types. This is
a bitmask, with set bits indicating that the associated parameters are
active, i.e., being monitored (e.g. rain or snow), or determined by
algorithm (e.g., haze, smoke). (LSB=1, MSB=16)
Bit Meaning
--- -------
1 Mist monitoring active
2 Fog monitoring active
3 Ground fog monitoring active
4 Ice fog monitoring active
5 Haze monitoring active
6 Smoke monitoring active
7 Dust, volcanic ash monitoring active
8 Blowing snow, sand monitoring active
9 Rain monitoring active
10 Snow grains monitoring active
11 Freezing rain monitoring active
12 Small hail and/or ice pellets monitoring active
13 Ice pellets monitoring active
14 Snow monitoring active
15 Ice crystals monitoring active
16 Hail monitoring active
38. The road variable mobile head lights (HEDLIT) indicates whether the
headlights are on or not.
Value Meaning
----- -------
0 Not on
1 On
39. The road variable surface black ice signal (RDBIS) indicates if black
ice is detected.
Value Meaning
----- -------
0 Reserved
1 Other
2 No ice
3 Black Ice
4 Detector error
40. The road variable visibility situation (VISSIT) describes visibility
of travel environment.
Value Meaning
----- -------
0 Reserved
1 Other visibility anomaly
2 Unknown
3 Clear
4 Fog - not patchy
5 Patchy fog
6 Blowing snow
7 Smoke
8 Sea spray
9 Vehicle spray
10 Blowing dust or sand
11 Sun glare
12 Swarms of insects
41. The road variable mobile wipers (WIPER) indicates whether
the wipers are on or not.
Value Meaning
----- -------
0 Not on
1 On
42. The road variable precipitation Yes No (PCPYN) indicates if
precipitation detected.
Value Meaning
----- -------
0 Reserved
1 Precip
2 No Precip
3 Error
* The COOP dataset is only available with the FSL database.