nowcast.ini

The following example shows the nowcast.ini configuration file for configuring the nowcasting HTTP server.

; Algorithm to use.
correlator=trec 

TREC

[trec]
; Number of decimals to keep in data when converting to integers.
; Range:  [0 ; 3]. Default: 2.
input_precision=2

; The value in image that declares a missing/invalid value.
; Default: -999.0.
missing_value=-999.0

; The value in image that declares a not-scanned pixel, outside the aperture area.
; Default: -900.0.
not_scanned_value=-900.0

; Minimum measurement aperture coverage (%) in correlation region.
; Range:  [0.0 ; 1.0]. Default: 0.60.
aperture_coverage_threshold=0.60

; Minimum signal value for the pixel to be 'active' and used.
; Default: 10.0.
signal_threshold=10.0

; Feature box size.
; Range:  > 0 Default: 14
field_feature_box_width=14

; Amount of skip when calculating field values.
; Range:  > 0.  Default: 1 (no skip).
field_feature_box_spacing=1 

; Minimum fraction (%) of active pixels in feature box needed to trigger correlation analysis.
; Range:  [0.0 ; 1.0] Default: 0.10
field_signal_coverage_threshold=0.10

; Minimum allowable cross-correlation coefficient.
; Range:  [0.0 ; 1.0] Default: 0.55
correlation_threshold=0.55

; Maximum storm movement between images, search region radius.
; Range:  > 0  Default: 15
speed_limit=15

; Spatial smoothing factor, exp(-d/decay). Used for spreading effect
; of local motion vector to its surroundings.
; Range:  >= 0 (0 == no spatial smoothing) Default: 6
field_spatial_decay=6

; Spatial filtering flag. Whether to discard points that differ from global average.
; Range:  0 == NO; 1 == GLOBAL; 2 == LOCAL . Default: 1(GLOBAL)
field_use_spatial_filtering=1

; Feature box size for local spatial thresholding (applied only when using local spatial thresholding).
; Range:  > 0   Default: 9
field_spatial_filtering_box_width=9

; Maximum allowed direction difference from mean motion (applied only when using spatial filtering).
; Range: [0 ; 180]  Default: 90
field_spatial_direction_threshold=90

; Maximum allowed speed (mgt*mean_motion) above mean motion (applied only when using global spatial filtering).
; Range:  >= 1.0  Default: 3.0
field_spatial_magnitude_threshold=3.0

; Global vector weight applied to local values.
; Range:  [0.0 ; 1.0] (0.0 = no global weighting). Default: 0.25
field_global_weight=0.25

; Method for temporal smoothing.
; Range: 0 == NO_TEMPORAL_SMOOTHING; 1 == HISTORY_WEIGHTING; 2 == CHANGE_WEIGHTING.
; Default: 1(HISTORY_WEIGHTING)
temporal_smoothing_method=1

; History weight factor (applied when temporal smoothing is made by using HISTORY_WEIGHTING).
; Range:  ]0.0 ; 1.0]  Default: 0.25
temporal_smoothing_history_weight=0.25

; Change weight factor (applied when temporal smoothing is made by using CHANGE_WEIGHTING).
; Range:  ]0.0 ; 1.0] Default: 0.33
temporal_smoothing_change_weight=0.33