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This page provides description of the variables included in the Sensor Specification metadata. Use this to guide completion of a Sensor Specification metadata template for each sensor. Refer to the Sensor metadata requirement level for guidance on which variables are required, recommended, optional or not applicable for different sensor types.
Sensor Specification Metadata Content - Click links below for full description.
Specifications of the foreoptic used for data collection. A foreoptic could be an optical lens, a fiber optic, a combined fiber optic+lens, etc. Include serial numbers if applicable.
Example
Canon Zoom Lens EF-M 15-45 mm with a neutral density filter; Fiber optic cable with a variable FOV optical lens; None
Image area and size
Variable name
image_size
Unit or format
free text
Description
Image size in pixels
Example
DX 6000 _ 4000 = 24 megapixel
Shutter speed
Variable name
shutter_speed
Unit or format
s
Description
Camera shutter speed. Can be fixed for all flights or a range of values if variable.
Example
1/200
Focal length
Variable name
focal_length
Unit or format
numeric
Description
Instrument focal length
Example
35mm, 18-55mm
FOV
Variable name
fov
Unit or format
degrees
Description
The instrument field of view. For LiDAR specify horizontal and vertical FOV
Example
360, 40
ISO
Variable name
iso
Unit or format
numeric
Description
ISO light sensitivity setting. Can be fixed for all flights or a range of values if variable.
Example
100
Focus
Variable name
focus
Unit or format
free text
Description
Camera focus setting. List all that were used
Example
auto, infinity
White balance
Variable name
white_balance
Unit or format
free text
Description
Camera white balance settings used. List all settings used during campaign.
Example
sunlight
Quantization
Variable name
quant
Unit or format
free text
Description
Image bit depth
Example
12-bit
File format
Variable name
file_format
Unit or format
free text
Description
Sensor output file format
Example
jpg
Sensor measurement units
Variable name
sensor_units
Unit or format
free text
Description
The measurement units output by the sensor
Example
Digital Number; Radiance; brightness temperature; degrees Celsius
Accuracy
Variable name
accuracy
Unit or format
free text
Description
Instrument/sensor measurement accuracy as per manufacturer specifications
Example
+/- 1 degree
Precision
Variable name
precision
Unit or format
free text
Description
Instrument/sensor measurement precision as per manufacturer specifications
Example
+/- 1 meters
Sensitivity
Variable name
sensitivity
Unit or format
free text
Description
Instrument sensitivity as per manufacturer specifications. The smallest difference between two features that is detectable by the sensor.
Example
0.1 degrees
Collection Frame Rate
Variable name
frame_rate
Unit or format
Hz
Description
Measurement frame rate or speed
Example
30
Sensor spectral response functions
Variable name
spectral_response_function
Unit or format
defined vocabulary: yes, no
Description
Indicate if spectral response functions are included in data package
Example
Table of band number, wavelength, and intensity
Integration time
Variable name
integration_time
Unit or format
free text
Description
Measurement integration time. Can be fixed value or range.
Example
1 - 2 s
Spectral range
Variable name
spectral_range
Unit or format
free text
Description
Instrument measurement wavelength range. Can be more than one if a co-aligned instrument
Example
350 ~ 1000 nm
Spectral resolution
Variable name
spectral_res
Unit or format
free text
Description
Instrument measurement resolution. Can be more than one if a co-aligned instrument
Example
1.5 nm
Navigation
Variable name
nav_system
Unit or format
free text
Description
Make/Model of GNSS Inertial Measurement Unit used with the sensing system
Example
Trimble APX-15L w/ AV18 antenna
Spatial pixels
Variable name
spatial_pixels
Unit or format
numeric
Description
For each sensor plus combined
Example
1240
F-number
Variable name
f_number
Unit or format
free text
Description
The fixed or selected aperture size for the data collection
Example
F/4
weight
Variable name
weight
Unit or format
grams
Description
Weight of sensor
Example
925
LiDAR wavelength
Variable name
lidar_wavelength
Unit or format
nanometers
Description
LiDAR beam wavelength
Example
903
LiDAR channels
Variable name
lidar_channels
Unit or format
integer
Description
The total number of LiDAR channels (laser beams) used for data collection