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Data Usage Guidance/Restrictions
The operational data for this datatype is available to all registered CLASS users. Pre-operational data may be restricted to authorized users. To become an authorized user, send a request to the CLASS Help Desk.
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Dataset Name
The name of the CoastWatch data set archived at CLASS. There are two different naming formats used for these files:
CoastWatch-RegionYearDayStart-Time.CoastWatch-SubregionProduct-Type with each qualifier defined below:
| Qualifier |
Details |
| CoastWatch-Region |
One character identifying the CoastWatch Region to which this data applies. Valid character is:
m = Gulf of Mexico |
| Year |
Last two digits of the year (99 = 1999, 00 = 2000), which identifies the year in which the spacecraft began recording the data set. |
| Day |
Day of the year [001-366], which identifies the Julian day on which the spacecraft began recording the data set. |
| Start-time |
e.g. 13, where "13" denotes 13 hours UTC (to the nearest hour) and represents the time at which spacecraft recording began. |
| CoastWatch-Subregion |
One character identifying sub-regions within the CoastWatch region to which data pertains. Valid sub-region characters are:
t = Texas high resolution
c = Central Gulf Coast high resolution
w = West Florida high resolution
l = Louisiana and Mississippi high resolution
y = Gulf of Mexico synoptic
p = Yucatan Peninsula high resolution
x = Extended Gulf of Mexico
r = Full Regional panel |
| Product-type |
Two characters identifying codes for the types of products. Valid character groups are:
b7 = daytime/nighttime split-window non-linear sea-surface-temperature (c4 and c5
)bm = daytime/nighttime multiple sea-surface-temperature algorithm
c1 = AVHRR channel 1 albedo (%)
c2 = AVHRR channel 2 albedo (%)
c3 = AVHRR channel 3 brightness temperature (deg C)
c4 = AVHRR channel 4 brightness temperature (deg C)
c5 = AVHRR channel 5 brightness temperature (deg C)
cm = cloud mask
d1 = daytime split-window multi-channel sea-surface-temperature (c4 and c5)
d7 = daytime split-window non-linear sea-surface-temperature (c4 and c5)
s3 = nighttime triple-window multi-channel sea-surface-temperature (c3, c4, c5)
s7 = nighttime split-window non-linear sea-surface-temperature (c4 and c5)
s9 = nighttime triple-window non-linear sea-surface-temperature (c3, c4, c5)
sm = nighttime multiple sea-surface-temperature algorithm
za = Solar zenith angle (degrees) |
- Year_Day_Start-Time_Spacecraft-Unique-ID_CoastWatch-RegionCoastWatchSubregion_Product-Type. File-Format with each qualifier defined below:
| Qualifier |
Details |
| Year |
Full year with century, e.g., 2005, which identifies the year in which the spacecraft began recording the data set. |
| Day |
Day of the year [001-366], which identifies the Julian day on which the spacecraft began recording the data set. |
| Start-Time |
e.g. 1355, where "1355" denotes 13 hours 55 minutes UTC (to the nearest minute) and represents the time at which spacecraft recording began. |
| Spacecraft-Unique-ID |
n15 = NOAA-15 (NOAA-K)
n16 = NOAA-16 (NOAA-L)
n17 = NOAA-17 (NOAA-M) |
| CoastWatch-Region |
One character identifying CoastWatch Region to which this data applies. Valid characters is:
m=Gulf of Mexico |
| CoastWatch-Subregion |
One or two characters identifying sub-regions within the CoastWatch region to which the data pertains. Valid sub-region characters are:
t = Texas high resolution
c = Central Gulf Coast high resolution
w = West Florida high resolution
l = Louisiana and Mississippi high resolution
y = Gulf of Mexico synoptic
p = Yucatan Peninsula high resolution
x = Extended Gulf of Mexico
r = Full Regional panel |
| Product-Type |
Two characters identifying codes for the types of products. Valid character groups are:
b7 = daytime/nighttime split-window non-linear sea-surface-temperature (c4 and c5
)bm = daytime/nighttime multiple sea-surface-temperature algorithm
c1 = AVHRR channel 1 albedo (%)
c2 = AVHRR channel 2 albedo (%)
c3 = AVHRR channel 3 brightness temperature (deg C)
c4 = AVHRR channel 4 brightness temperature (deg C)
c5 = AVHRR channel 5 brightness temperature (deg C)
cm = cloud mask
d1 = daytime split-window multi-channel sea-surface-temperature (c4 and c5)
d7 = daytime split-window non-linear sea-surface-temperature (c4 and c5)
s3 = nighttime triple-window multi-channel sea-surface-temperature (c3, c4, c5)
s7 = nighttime split-window non-linear sea-surface-temperature (c4 and c5)
s9 = nighttime triple-window non-linear sea-surface-temperature (c3, c4, c5)
sm = nighttime multiple sea-surface-temperature algorithm
za = Solar zenith angle (degrees) |
| File-Format |
cwf ( denotes CoastWatch Format) |
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Dataset Size
The size of the file to be delivered to the user in bytes.
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Data Source
Code internal to CLASS for the source of CoastWatch regional input data.
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Inventory ID
A unique numerical ID assigned to the data set for CLASS inventory purposes.
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Product
The datatypes or products available for CoastWatch Gulf of Mexico are:
B7 = daytime/nighttime split-window non-linear sea-surface-temperature (c4 and c5)
BM = daytime/nighttime multiple sea-surface-temperature algorithm
C1 = AVHRR channel 1 albedo (%)
C2 = AVHRR channel 2 albedo (%)
C3 = AVHRR channel 3 brightness temperature (deg C)
C4 = AVHRR channel 4 brightness temperature (deg C)
C5 = AVHRR channel 5 brightness temperature (deg C)
CM = cloud mask
D1 = daytime split-window multi-channel sea-surface-temperature (c4 and c5)
D7 = daytime split-window non-linear sea-surface-temperature (c4 and c5)
S3 = nighttime triple-window multi-channel sea-surface-temperature
S7 = nighttime split-window non-linear sea-surface-temperature
S9 = nighttime triple-window non-linear sea-surface-temperature
SM = nighttime multiple sea-surface-temperature algorithm
ZA = Solar zenith angle (degrees)
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Region
Identifies the five character CoastWatch region that the data is mapped to. Valid regions are:
| Five Letter Code |
CoastWatch Region |
| CWGOM |
CoastWatch Region Gulf of Mexico |
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Satellite
The satellite that acquired the CoastWatch data.
| N15 |
NK |
NOAA-15 |
| N16 |
NL |
NOAA-16 |
| N17 |
NM |
NOAA-17 |
| N18 |
NN |
NOAA-18 |
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Subregion
Valid CoastWatch subregions are:
MT = Texas high resolution
MC = Central Gulf Coast high resolution
MW = West Florida high resolution
ML = Louisiana and Mississippi high resolution
MY = Gulf of Mexico synoptic
MP = Yucatan Peninsula high resolution
MX = Extended Gulf of Mexico
MR = Full Regional Panel
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Temporal
Refers to the time span of interest to the user. This section of the search page allows the user to define the range of dates/times of interest.
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Time
The UTC date and time corresponding to the beginning of the coverage of the given dataset. Format is yyyy-mm-dd hh:mm:ss.fff where fff is the fraction of a second in milliseconds.
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UTC
Coordinated Universal Time (UTC) is the international time standard. It is the current term for what was referred to as Greenwich Meridian Time (GMT). Zero (0) hours UTC is midnight in Greenwich England, which lies on the zero longitudinal meridian. Universal time is based on a 24 hour clock, therefore, afternoon hours such as 4 pm UTC are expressed as 16:00 UTC (sixteen hours, zero minutes).
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