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PDW module

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-class ammosreader.PDW.PDW(time_of_arrival, pdw_format_identifier, center_frequency, is_valid, is_pulse, level_unit, signal_start_missing, signal_end_missing, pulse_width, frequency_shift_or_bandwidth, pulse_level_or_pulse_field_strength, region_of_interest, azimuth_confidence, modulation, sector, polarity, df_quality, elevation, azimuth, channel)[source]
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Bases: object

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I store information from a single ppdw data block.

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-__init__(time_of_arrival, pdw_format_identifier, center_frequency, is_valid, is_pulse, level_unit, signal_start_missing, signal_end_missing, pulse_width, frequency_shift_or_bandwidth, pulse_level_or_pulse_field_strength, region_of_interest, azimuth_confidence, modulation, sector, polarity, df_quality, elevation, azimuth, channel)[source]
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Parameters
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  • time_of_arrival (Integer) – nanoseconds since 1970-01-01 00:00:00

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  • pdw_format (Integer) – format code

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  • center_frequency (Integer) – center frequency in KHz

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  • is_valid (Boolean) – flag to mark if pdw data body is valid

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  • is_pulse (Boolean) – flag to mark if pdw data body contains a pulse or a continuous wave signal

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  • level_unit (Integer) – 0 means dBµV - 1 means dBµV/m

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  • signal_start_missing (Boolean) – signal started before time of arrival

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  • signal_end_missing (Boolean) – signal stops after time of arrival

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  • pulse_width (Integer) – pulse width in nanoseconds - Zero if no valid pulse detected

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  • frequency_shift_or_bandwidth (Integer) – Value in KHz - Value set to 1048575 means Unknown

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  • pulse_level_or_pulse_field_strength (Float) – Pulse level or Pulse Field Strength depending on level_unit (-200.0…200.0) in 0.1 steps / minus 204.8 means no valid level detected

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  • region_of_interest (Boolean) – Marks if signal is from region of interest

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  • azimuth_confidence (Float) – degree in steps of 0.1 (0.0-6.2) / 6.3 means confidence unknown

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  • modulation (String) – type of modulation (e.g. PSK-2, PSK-4, FM etc.)

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  • sector (Integer) – reference antenna sector (0-15)

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  • polarity (String) – Horizontal, Vertical, Clockwise, Counter clockwise

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  • df_quality (Integer) – Direction finding quality in percent (0-100) - Zero means unknown

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  • elevation (Float) – elevation of incoming signal (from -90 to 90 degree) in steps of 0.1 degree minus 102.4 means unknown

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  • azimuth (Float) – azimuth of incoming signal (from 0 to 359.9 degree) in steps of 0.1 degree plus 409.5 means unknown

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  • channel (Integer) – detecting channel (0-16) - Zero means unknown

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Returns
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An instance of class PDW with attributes set according to the data of a data body

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Return type
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PDW

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-classmethod from_bytes(byte_string)[source]
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I create an instance of class PDW from data body (8 * 32 bits)

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Parameters
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byte_string (byte string) – a byte string containing a single data body read from a ppdw file

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Returns
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an instance of class PDW with attributes set according to the data of a data body

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Return type
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PDW

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PDW module

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