|
|
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.
Back to the top |
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:
a = Alaska |
| 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:
l = Aleutian Islands
a = Aleutian Islands synoptic
b = Beaufortt = Bering Straight
c = Chukchi
g = Gulf of Alaska
h = Anchorage
j = Juneau
n = Northern Alaska synoptic
s = Southern Alaska synoptic
u = Unalaska
v = Vancouver
y = Western Alaska
w = Western Alaska Synoptic
x = Southern Alaska
z = Northern Alaska |
| Product-type |
Two characters identifying codes for the types of products. Valid character groups are:
b1 = daytime/nighttime split window multi-channel sea-surface-temperature (c4 and c5)
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 (%)
c4 = AVHRR channel 4 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)
s1 = nighttime split-window multi-channel 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 |
- 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 the CoastWatch Region to which this data applies. Valid character is:a = Alaska |
| CoastWatch-Subregion |
One character identifying sub-regions within the CoastWatch region to which data pertains. Valid sub-region characters are:
l = Aleutian Islands
a = Aleutian Islands synoptic
b = Beaufort
t = Bering Straight
c = Chukchi
g = Gulf of Alaska
h = Anchorage
j = Juneau
n = Northern Alaska synoptic
s = Southern Alaska synoptic
u = Unalaska
v = Vancouver
y = Western Alaska
w = Western Alaska Synoptic
x = Southern Alaska
z = Northern Alaska |
| Product-Type |
Two characters identifying codes for the types of products. Valid character groups are:
b1 = daytime/nighttime split window multi-channel sea-surface-temperature (c4 and c5)
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 (%)
c4 = AVHRR channel 4 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)
s1 = nighttime split-window multi-channel 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 |
| File-Format |
cwf ( denotes CoastWatch Format) |
Back to the top |
Dataset Size
The size of the file to be delivered to the user in bytes.
Back to the top |
Data Source
Code internal to CLASS for the source of CoastWatch regional input data.
Back to the top |
Inventory ID
A unique numerical ID assigned to the data set for CLASS inventory purposes.
Back to the top |
Product
The datatypes or products available for the CoastWatch Alaska region are:
B1 = daytime/nighttime split window multi-channel sea-surface-temperature (c4 and c5)
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 (%)
C4 = AVHRR channel 4 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)
S1 = nighttime split-window multi-channel sea-surface-temperature
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
Back to the top |
Region
Identifies the five character CoastWatch region that the data is mapped to. Valid regions are:
| Five Letter Code |
CoastWatch Region |
| CWALA |
CoastWatch Region Alaska |
Back to the top |
Satellite
The satellite that acquired the CoastWatch data.
| N15 |
NK |
NOAA-15 |
| N16 |
NL |
NOAA-16 |
| N17 |
NM |
NOAA-17 |
| N18 |
NN |
NOAA-18 |
Back to the top |
Subregion
Valid CoastWatch subregions are:
AA = Aleutian Islands synoptic
AB = Beaufort
AC = Chukchi
AG = Gulf of Alaska
AH = Anchorage
AJ = Juneau
AL = Aleutian Islands
AN = Northern Alaska synoptic
AS = Southern Alaska synoptic
AT = Bering Straight
AU = Unalaska
AV = Vancouver
AW = Western Alaska Synoptic
AX = Southern Alaska
AY = Western Alaska
AZ = Northern Alaska
Back to the top |
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.
Back to the top |
Time
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).
Back to the top |
