Field
N: This field is used to identify which QA procedure was followed
at the time of the QA inspection. It is expected that the QA procedure
will evolve as more data is collected and new "problems" are identified.
As a result, each orbit must be marked so that the user (and QA inspector)
can identify which orbits were checked for specific "problems".
Field
O: This field is used to identify when a change is made to the
code that processed the data, such as changes in the input parameters
to the processing code. Each orbit must be marked so that the user
(and QA inpector) can identify which orbits were processed using specific
input parameters.
Fields
F & G: The start longitude is defined as the satellite nadir
longitude (rounded to the nearest 0.5 degrees) at the time when the
satellite is at its southernmost point in the orbit. The end longitude
is calculated in the same manner, and it is the same longitude as
the start longitude for the following orbit.
Fields
B & E: The start time corresponds with the time which the
leading edge of the instrument field-of-view crosses the start longitude,
which is BEFORE the time of the satellite nadir crossing of this longitude.
Similarly, the end time corresponds with the time that the trailing
edge of the instrument field-of-view crosses the end longitude, which
is AFTER the time of the satellite nadir crossing of this longitude.
Note that there will be some overlap in the time spans of successive
orbits.
ORBIT
structure name: orbit
Status
Parameter
Structure
Element Name
Type
Size
Description
A
Orbit ID
id_number
int32
1
the number
of this orbit, where the orbit count starts at launch
B
TAI93 start
time
TAI93_start
float64
1
start of
this orbit in TAI93 time (leading edge of field-of-view crossing
longitude orbit boundary)
C
UTC start
time
UTC_start
char
28
start of
this orbit in UTC time
D
GPS start
time
GPS_start
float64
1
start of
this orbit in GPS time
E
TAI93 end
time
TAI93_end
float64
1
end of this
orbit in TAI93 time (trailing edge of field-of-view crossing orbit
boundary)
F
start longitude
start_longitude
float32
1
longitude
boundary defining start of this orbit
G
end longitude
end_longitude
float32
1
longitude
boundary defining end of this orbit
H
number
of point data records
point_data_count
int16
1
number of
point data elements associated with this orbit
I
point data
child record number
point_data_address
int16
1
address
of the first element in point data structure that corresponds
with this orbit
J
number
of one-second records
one_second_count
int32
1
number of
elements in the one-second data associated with this orbit
K
one-second
child record number
one_second_address
int32
1
address
of the first element in the one-second data structure that corresponds
with this orbit
L
number
of summary GIF images
summary_image_count
int16
1
number of
summary GIF images associated with this orbit
M
summary
GIF image record number
summary_image_address
int16
1
address
of the first summary GIF image structure that corresponds with
this orbit
N
Inspection
Code
inspection_code
int16
1
Code indicating
which problem scenarios were checked by the QA inspector
O
Configuration
Code
config_code
int16
1
Code indicating
which code configuration scenario was used when processing the
data
Notes: