Difference between revisions of "UvA-BiTS Tracking Data"

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Each row represents the start of a block of acceleration measurements when a GPS fix is not available at that acceleration block's time.
 
Each row represents the start of a block of acceleration measurements when a GPS fix is not available at that acceleration block's time.
  
The logger tries to mark the start of blocks from the GPS fix that coincides with the begin of the acceleration block. If there's no GPS fix during that block, then it extrapolates the date and time and makes a special record which is interpreted by our accelerometer processing software and inserted into this specific table.  
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The logger tries to mark the start of blocks from the GPS fix that coincides with the begin of the acceleration block. If there's no GPS fix during that block, then it extrapolates the date and time and makes a special record which is interpreted by our accelerometer processing software and made available through this view.  
  
Therefore, to know all valid dates and times that mark a valid block for a tracker, you need to consider all of the values in column date_time on table gps.ee_tracking_data101 for the given tracker, and all the values on column date_time for that tracker. And the order is important within each block, so you should sort the acceleration measurements by block and index.
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Therefore, to know all valid dates and times that mark a valid block for a tracker, you need to consider all of the values in column date_time on gps.ee_tracking_speed_limited for the given tracker, column date_time on gps.ee_acc_start_limited, and all the values on column date_time for that tracker. And the order is important within each block, so you should sort the acceleration measurements by block and index.
  
 
Added in firmware 1.0.2.7.
 
Added in firmware 1.0.2.7.

Revision as of 17:48, 6 November 2014

gps.ee_project_limited

Each row shows the details of each project, for the projects you are allowed to see.

COLUMN_NAME TYPE_NAME IS_NULLABLE DESCRIPTION
key_name varchar NO Unique key name, with the form <species>_<place>
station_name varchar NO Where the receiving station is
start_date timestamp NO Project start date
end_date timestamp NO Date at which the project is not relevant any more
description text YES String for free description. Updatable by the user.
project_id int8 NO Project unique id. Included just to enable joins.
parent_id int8 YES Reference to the parent project in the hierarchy.

gps.ee_tracker_limited

Each row shows tracker details for all trackers that your projects allow you to see.

This view replaces the old gps.uva_device_limited.

COLUMN_NAME TYPE_NAME IS_NULLABLE DESCRIPTION
device_info_serial int8 NO Serial number of the tracker
firmware_version varchar YES String for firmware version
mass numeric(4,2) YES Mass (in grams)
start_date timestamp NO Date before which the device is not relevant
end_date timestamp NO Date at which the device is not relevant any more
x_o numeric(30,6) YES Accelerometer calibration: offset on the x (or surge) axis
x_s numeric(30,6) YES Accelerometer calibration: sensitivity on the x (or surge) axis
y_o numeric(30,6) YES Accelerometer calibration: offset on the y (or sway) axis
y_s numeric(30,6) YES Accelerometer calibration: sensitivity on the y (or sway) axis
z_o numeric(30,6) YES Accelerometer calibration: offset on the z (or heave) axis
z_s numeric(30,6) YES Accelerometer calibration: sensitivity on the y (or heave) axis
tracker_id int8 NO Tracker unique id. Included just to enable joins.

gps.ee_individual_limited

Each row shows bird's details for all birds that your projects allow you to see.

This view replaces the old gps.uva_individual_limited.

COLUMN_NAME TYPE_NAME IS_NULLABLE DESCRIPTION
ring_number varchar NO Ring number.
species_latin_name varchar NO Latin name of the species of the bird.
colour_ring varchar YES String for ring colour.
sex varchar NO Sex (M=male, F=female, X=unknown/unspecified)
mass numeric(5,0) YES Mass (grams)
start_date timestamp NO Date before which the bird is not relevant.
end_date timestamp NO Date at which the bird is no longer relevant.
remarks text YES Text for user remarks
individual_id int8 NO Bird unique id. Included just to enable joins.

gps.ee_track_session_limited

Each row shows track session's information for all track sessions that your projects allow you to see.

COLUMN_NAME TYPE_NAME IS_NULLABLE DESCRIPTION
key_name varchar NO The project that the track session belongs to.
device_info_serial int8 NO Serial number of the tracker this track session involves.
ring_number varchar NO Ring number of the bird that this track session involves.
start_date timestamp NO Date before which the track session is not relevant
end_date timestamp NO Date at which the track session is not relevant any more
remarks text YES Free text for comments
start_latitude numeric(11,8) NO Latitude where the bird was tagged
start_longitude numeric(11,8) NO Longitude where the bird was tagged
project_id int8 NO Reference to the project this track session belongs to. Included just to enable joins.
tracker_id int8 NO Reference to the tracker this track session involves. Included just to enable joins.
individual_id int8 NO Reference to the individual this track session involves. Included just to enable joins.
track_session_id int8 NO Unique identifier of the track session. Included just to enable joins.

gps.ee_tracking_speed_limited

Shows the tracking data that your projects allow you to see.

Each row represents a GPS fix as it is interpreted from the data that comes via the GPS tracker, plus it adds speeds.

It replaces old views gps.uva_tracking_limited, gps.uva_tracking_speed_3d_limited and gps.uva_tracking_speed. This table structure has not changed with respect to our previous database.

COLUMN_NAME TYPE_NAME IS_NULLABLE DESCRIPTION
device_info_serial int4 NO Serial number of the tracker that reported the fix. Part of the unique identifier of the GPS fix.
date_time timestamp NO Time when the fix was taken. UTC (i.e.: no timezone). Part of the unique identifier of the GPS fix.
latitude float8 YES Latitude of the GPS fix.
longitude float8 YES Longitude of the GPS fix.
altitude int4 YES Altitude above sea level measured by GPS tag in meters
pressure int4 YES Pressure measured by GPS tag sensor in Pascals
temperature float8 YES Temperature measured by GPS tag sensor in Celsius
h_accuracy float8 YES Horizontal accuracy (meters)
v_accuracy float8 YES vertical accuracy (meters)
x_speed float8 YES meters/second
y_speed float8 YES meters/second
z_speed float8 YES meters/second
gps_fixtime float8 YES GPS fix time (also known as Time to Fix) in seconds
userflag int4 YES Acceptable = 0; Data flagged as unacceptable by user if not equal to 0.
satellites_used int2 YES Number of satellites used for fix the GPS measurement
positiondop float8 YES Positional DOP (Dilution of Precision), unitless
speed_accuracy float8 YES
location geometry YES postgreSQL geometry; to allow GIS operations
vnorth float8 YES - vx * sin(lat) * cos(long) - vy * sin(lat) * sin (long) + vz * cos(lat)
veast float8 YES - vx * sin(lon) + vy * cos(lon)
vdown float8 YES - vx * cos(lat) * cos(lon) - vy * cos(lat) * sin(lon) - vz * sin(lat)
speed float8 YES - vx * sin(lon) + vy * cos(lon)
speed3d float8 YES - vx * cos(lat) * cos(lon) - vy * cos(lat) * sin(lon) - vz * sin(lat)
direction numeric YES Heading in degrees; 0 is north, 90 is east

gps.ee_acceleration_limited

Each row represents an acceleration measurement as it is interpreted from the data that comes via the accelerometer. Acceleration is looked at in batches for a period of time, for 3 components (X,Y,Z). The blocks are delimited by a starting date and time, and then each observation is numbered consecutively.

The logger tries to mark the start of blocks from the GPS fix that coincides with the beginning of the acceleration block. If there's no GPS fix during that block, then it extrapolates the date and time and makes a special record which is interpreted by our accelerometer processing software and you can find it via gps.ee_acc_start_limited. Therefore, to know all valid dates and times that mark a valid block for a tracker, you need to consider all of the values in column date_time on gps.ee_tracking_speed_limited for the given tracker, column date_time on gps.ee_acc_start_limited, and all the values on column date_time for that tracker. And the order is important within each block, so you should sort the acceleration measurements by block and index.

This table structure has not changed with respect to our previous database.

COLUMN_NAME TYPE_NAME IS_NULLABLE DESCRIPTION
device_info_serial int4 NO Serial number of the tracker that reported the fix. Part of the unique identifier of the GPS fix.
date_time timestamp NO Time of the acceleration block that this measurement belongs to.
index int2 NO Sorting order of the measurement within the acceleration block (each block starts at 0).
x_acceleration int2 YES Acceleration measured on the x (or surge) axis (range between -2666 and 2666).
y_acceleration int2 YES Acceleration measured on the y (or sway) axis (range between -2666 and 2666).
z_acceleration int2 YES Acceleration measured on the z (or heave) axis (range between -2666 and 2666).

gps.ee_acc_start_limited

Each row represents the start of a block of acceleration measurements when a GPS fix is not available at that acceleration block's time.

The logger tries to mark the start of blocks from the GPS fix that coincides with the begin of the acceleration block. If there's no GPS fix during that block, then it extrapolates the date and time and makes a special record which is interpreted by our accelerometer processing software and made available through this view.

Therefore, to know all valid dates and times that mark a valid block for a tracker, you need to consider all of the values in column date_time on gps.ee_tracking_speed_limited for the given tracker, column date_time on gps.ee_acc_start_limited, and all the values on column date_time for that tracker. And the order is important within each block, so you should sort the acceleration measurements by block and index.

Added in firmware 1.0.2.7.

COLUMN_NAME TYPE_NAME IS_NULLABLE DESCRIPTION
device_info_serial int4 NO Serial number of the tracker that reported the acceleration measurement.
date_time timestamp NO Time to mark the start of the acceleration block.
line_counter int4 NO Number of lines associated with this set of accelerations.
timesynced int2 YES The source of the time that marks the acceleration block (0=not synced, 1=user set, 2=Gps Synced).
ascii int4 YES Acceleration measurement interval.
accsn int4 YES Number of samples (0-65536).
f int2 YES Acceleration sampling frequency (0=20Hz, 1=10Hz, 2=5Hz, 3=1Hz).