Metadata

Metadata is the term used to describe all the ancillary information about an image that might be important to the user.

This page captures all the metadata items that are present in ICEYE imagery. You can use the search bar at the top from any page and enter the metadata element you are interested in and it will find it on this page.

ICEYE Product Metadata (Version 2.4)

Format Metadata Elements	Description	Type	Unit	Example	HDF5	SLC-XML	GEOTIF	AMP-XML
acquisition_end_utc	UTC time for when the last pulse of the scene was sent	ASCII	UTC time	2019-03-10T18:20:00.307546
acquisition_id	Identitification number for this acquisition	ASCII	int	469840
acquisition_mode	Acquisition mode used	ASCII	text	Stripmap, Spotlight
acquisition_prf	Pulse Repetition Frequency used for the acquisition	float64	Hz	4823.00342969132
acquisition_start_utc	UTC time for when the first pulse of the scene was sent	ASCII	UTC time	2019-03-10T18:19:50.316054
angX	X-component of the antenna pointing orientation	vector of float64		TBP
angY	Y-component of the antenna pointing orientation	vector of float64		TBP
angZ	Z-component of the antenna pointing orientation	vector of float64		TBP
ant_elev_corr_flag	Flag indicating if antenna elevation pattern compensation was applied	int64	flag	1
antenna_pattern_compensation	Amplification factor applied for antenna pattern compensation (for each range sample)	vector of float	numbers	[1.8106, 1.8103...1.0956,1.0957]
AREA_OR_POINT	geotif flag indicating if this is an area collection or a point collection	ASCII	text	Area' or 'Point'
avg_scene_height	Average elevation over ellipsoid (calculated using SRTM or other low resolution global DEM)	float32	meters	661
azimuth_ground_spacing	Azimuth sample spacing in meters with the average ground projected velocity	float64	meters	1.44733
azimuth_spacing	Azimuth sample spacing in meters with the average ground projected velocity	float64	meters	1.44733
azimuth_look_bandwidth	Bandwidth of each look in range (only for GRD products)	float64	Hz	1157.2
azimuth_look_overlap	Overlap of adjacent looks in azimuth (only for GRD products)	float64	Hz	289.3
azimuth_looks	Looks in azimuth direction (for SLC products it is 1)	int64	number	3
azimuth_resolution	3dB resolution of this data product	float64	meters	2.49
azimuth_time_interval	Time interval between azimuth samples in the SLC product. (=1/processing_prf)	float64	seconds	0.0002073
calibration_factor	Factor to be applied to calibrate detected products to absolute brightness intensity	float64	number	1.2341123e-05
carrier_frequency	Carrier frequency of the radar system, static parameter	float64	Hz	9650000000
chirp_bandwidth	Bandwidth used for radar pulse (defines achievable radar range resolution)	float64	Hz	134000000
chirp_duration	Duration of chirp	float64	seconds	4.1473e-05
coord_center	Centre coordinate [x(col), y(row),lat,lon]	[int32,int32, float64, float64]	coordinates	[8440,22139,34.86704,-117.99988]
coord_first_far	First azimuth row far range coordinate. [x(col), y(row),lat,lon]	[int32,int32, float64, float64]	coordinates	[16878,1,35.17738,-118,11233]
coord_first_near	First azimuth row near range coordinate. [x(col), y(row),lat,lon]	[int32,int32, float64, float64]	coordinates	[1,1,35.12016,-117.74549]
coord_last_far	Last azimuth row far range coordinate. [x(col), y(row),lat,lon]	[int32,int32, float64, float64]	coordinates	[16878,44298,34.61222,-118.24414]
coord_last_near	Last azimuth row near range coordinate. [x(col), y(row),lat,lon]	[int32,int32, float64, float64]	coordinates	[1,44298,34.55509,-117.88013]
data_orientation	Can be either "native" or "shadows_down". This describes the data inside the product storage arrays. 'native' means columns are for increasing range and increasing rows are slow time. ''shadows-down' means increasing rows are increasing range and columns represent slow-time direction	ASCII	text	"native"
dc_estimate_coeffs	Doppler centroid coefficient as a 2D array, size MxN, where M is the number of DC estimates, and N is the (DC polynomial order+1)	2D array of float64, size MxN	number	[[5.417583e+03, 1.130813e+07, -8.125472e+09,7.947223e+12], ... [5.417583e+03, 1.130813e+07, -8.125472e+09,7.947223e+12]]
dc_estimate_poly_order	Order of polynomial describing one doppler centroid estimate	int64	number	3
dc_estimate_time_utc	Timestamp for each doppler centroid estimate	ASCII list	Time (UTC)	['2019-03-10T18:19:51.775477'],['2019-03-10T18:19:52.775477'],['2019-03-10T18:19:53.775477'],['2019-03-10T18:19:54.775477']]
Doppler_Centroid_Coefficients	XML Block of data containing sets of coefficiencts in a . Each Coefficient. Has a list index number , a and a . These are then followed by +1 coefficients (), each marked with a number () and a value (). See Doppler Centroid Coefficient Schema	Coefficient Block	Hz
Doppler_Rate	See Doppler Rate Coefficients Schema	Coefficient Block
doppler_rate_coeffs	Coefficients of doppler rate polynomial as a function of range time. Stored as a vector with size corresponding to the order of the doppler rate polynomial	vector of float64	number	[5.124592968269841e+03; -1.153864338674892e+06; 2.582540352459471e+08; -5.572042961000484e+10]
doppler_rate_poly_order	Order of polynomial describing doppler rate range dependence	int64	number	3
first_pixel_time	Two-way slant range time origin, corresponding to the near range (1st range sample)	float64	seconds	0.004398670017444
fsl_compensation	Amplification factor applied for free space loss compensation (for each range sample)	vector of float64	numbers	[1.0457, 1.0457...1.0841,1.0841]
gcp_terrain_model	Options are WGS84 for Ellipsoid, EGM96 for GEOID, DEM for DEM based	ASCII	text
geo_ref_system	Geographic reference frame indicator for scene coordinates and orbit state vectors	ASCII	text	WGS84
grd_amplitude	Amplitude array (only for GRD products). Sigma-nought conversion factor of sin(inc_angle) applied.	as ‘sample_precision’	number array
grsr_coefficients	ground range to slant range polynomial coefficients (only for GRD product)	vector of float64	number	[6.467483312430216e+05; 0.47388031307797884; 6.685331046296479e-07; -4.928145432555108e-13; 5.0525558404285224e-20]
GRSR_Coefficients	See GRSR_Coefficients schema	Coefficient Block
grsr_ground_range_origin	ground range origin for GRSR conversion		number	0
grsr_poly_order	Order of polynomial describing ground range to slant range projection dependence (only for GRD product)	int64	number	4
grsr_zero_doppler_time	ground range origin zero Doppler time	ASCII	UTC time	2019-04-08T14:50:13.120113
height_spline	Python numpy spline parameters for surface height used to focus image	hickle	meters
heading	Satellite heading at centre of imaging operation	float64	degrees
incidence_angle_coefficients	coefficients of the polynomial for calculating the incidence angle dependence in range	vector of float64	number	[ 2.67986035e+01; 8.66207416e-05; -5.61940883e-11; -1.73946139e-17; 8.22003978e-23]
Incidence_Angle_Coefficients	See Incidence_Angle_Coefficients XML Block Schema	Coefficient Block	number
incidence_angle_ground_range_origin	incidence angle origin in ground range, for calculating incidence angle dependence in range	float64	number	0
incidence_angle_poly_order	order of the polynomial for calculating the incidence angle dependence in range	int64	number	4
incidence_angle_zero_doppler_time	incidence angle origin zero Doppler time	ASCII	UTC time	2019-04-08T14:50:13.120113
incidence_center	incidence angle in ground at middle range	float64	degrees	23.5
incidence_far	incidence angle in ground at far range	float64	degrees
incidence_near	incidence angle in ground at near range	float64	degrees
lat_spline	Python numpy spline parameters for image pixel latitudes	hickle	degrees
local_incidence_angle	Array of values describing the local incidence angle or each range sample in the scene	[]float64	degrees
look_side	Look side of the acquisition, only 2 options LEFT or RIGHT	ASCII	text	LEFT
lon_spline	Python numpy spline parameters for image pixel longitudes	hickle	degrees
mean_earth_radius	mean WGS84 ellipsoid radius over scene	float64	meters	6371346.049
mean_orbit_altitude	mean sensor altitude above WGS84 ellipsoid	float64	meters	595177.494
number_of_azimuth_samples	Number of azimuth samples (number of rows in binary data)	int64	number	44298
number_of_dc_estimations	Number of doppler centroid estimates	int64	number	9
number_of_range_samples	Number of range samples (number of columns in binary data)	int64	number	16878
number_of_state_vectors	Total number of orbit state vectors provided for the scene	int64	number	120
orbit_absolute_number	Absolute number of orbits since launch	int64	number	1447
orbit_direction	Specifies whether the orbit is in ascending or descending node at the time of acquisition	ASCII	text	ASCENDING or DESCENDING
orbit_processing_level	PREDICTED (based on orbit propagation model ) RAPID (uses onboard GPS data ) PRECISE (corrections applied after GPS data received in ground using high precision orbit propagator (eg ODTK) SCIENTIFIC (Uses precise ground-based measurements together with all above to post-fix orbit to best possible)	ASCII	Text
orbit_relative_number	Relative number of orbit within the repeat cycle	int64	number	1447
orbit_repeat_cycle	Ground track repeat cycle (to be included)	int64	number	99999
Orbit_State_Vectors	See Orbit_State_Vectors XML Schema	Coefficient Block
pitch	Pitch angle of the satellite attitude	float	degrees	11.5
polarization	Transmit and receive polarizations used	ASCII	text	VV
posX	X-component of state vector position, for each state vector	vector of float64	meters	[-2401162517… -2456350660]
posY	Y-component of state vector position, for each state vector	vector of float64	meters	[-5201254993… -5253761907]
posZ	Z-component of state vector position, for each state vector	vector of float64	meters	[3963994744… 3859728760]
processing_prf	Pulse Repetition Frequency used for the processing, defines azimuth sample spacing in time (can be higher than acquisition in cases where the Doppler frequency needs to be unfolded due to high variation of Doppler centroid with range)	float64	Hz	9646.00685938265
processing_time	Timestamp provided by the SAR processor saying when the image for processed	ASCII	UTC Time	2020-05-27T05:01:49.123456
processor_version	Version number of the processor used to generate the product	float64	number	(internal version numbering)
product_level	Processing level	ASCII	text	SLC, GRD
product_file	File name of this product	ASCII	text	ICEYE_X2_SLC_SM_16519_20200102T155349.h5
product_name	ICEYE_datasetID_eventID_(YYYYMMDD)T(HHMMSS)	ASCII	Text	ICEYE_2457_123123_20191201T056721
product_type	Product type (if we have product names for different imaging modes)	ASCII	text	Stripmap, StripmapHigh, Spotlight, SpotlightHigh
range_look_bandwidth	Bandwidth of each look in range (only for GRD products)	float64	Hz	53600000
range_look_overlap	Overlap of adjacent looks in range (only for GRD products)	float64	Hz	13400000
range_looks	Looks in range direction (for SLC products it is 1)	int64	number	3
range_resolution_center	Scene centre range resolution	float64	meters	2.15
range_resolution_far	Range resolution at the far edge of the image	float64	meters	1.93
range_resolution_near	range resolution at the near edge of the image	float64	meters	2.49
range_sampling_rate	Sampling rate used for digital sampling, defines range sample spacing in time	float64	Hz	157500000
range_spacing
range_spread_comp_flag	Flag indicating if free space loss compensation was applied	int64	flag	1
ref_track_point_ecef	reference point for image in earth centred earth fixed coordinate frame	[]float64	m	array
ref_track_point_lla	reference poInt for image in terms of latitude, longitude and altitude	[]float64	deg,deg,m	array
RPC	RPC according to http://geotiff.maptools.org/rpc_prop.html	Coefficient Block
s_i	Real part of the SLC complex array (only for SLC products)	as ‘sample_precision’	number array
s_q	Imaginary part of the SLC complex array (only for SLC products)	as ‘sample_precision’	number array
sample_precision	Precision used for binary data samples	ASCII	text	float32, int16
satellite_look_angle	Satellite look angle	float64	degrees	23.5
satellite_name	Name of the satellite	ASCII	text	ICEYE-X2, ICEYE-X4...
scan_beams	Provides information Scan beams used in Scan mode (SCAN MODE ONLY)	Struct
slant_range_spacing	Spacing between two consecutive slant range samples in meters (SLC ONLY)	float64	meters	0.95172208888
slant_range_to_first_pixel	Two-way slant range distance corresponding to near range (1st sample)	float64	metres
spec_version	Version of the Level 1 Product Format Specification document	float64	number	2.3
state_vector_time_utc	Timestamp for each orbit state vector	list of ASCII	UTC time	[2019-03-10T18:19:48.000000, ...]
total_processed_bandwidth_azimuth	Doppler bandwidth used for azimuth compression (defines achievable azimuth resolution)	float64	Hz	2893
tropo_range_delay	Mean signal path length correction (one way) that has been applied to correct for tropospheric propagation	float64	meters	2.4
velX	X-component of state vector velocity, for each state vector	vector of float64	meters/sec	[-3285.698...-3245.220]
velY	Y-component of state vector velocity, for each state vector	vector of float64	meters/sec	[-3162.667...-3051.016]
velZ	Z-component of state vector velocity, for each state vector	vector of float64	meters/sec	[-6130.372...-6208.463]
window_function_azimuth	Windowing function used over azimuth frequencies	ASCII	text	taylor_20_4
window_function_range	Windowing function used over range frequencies	ASCII	text	taylor_20_4
yaw	Yaw angle of the satellite attitude	float	degrees
zerodoppler_end_utc	Time corresponding to when the satellite was at the zero Doppler position for the last scene pulse	ASCII	UTC time	2019-03-10T18:20:00.960210
zerodoppler_start_utc	Time corresponding to when the satellite was at the zero Doppler position for the first scene pulse	ASCII	UTC time	2019-03-10T18:19:51.775477