Datastream : MPLPOLFS

Micropulse Lidar (MPL) polarized, fast sampling: cloud base and top heights

Active Dates
2010.06.01 - 2012.10.04

Measurement Categories
Cloud Properties

Originating Instrument
Micropulse Lidar (MPL)

Measurements

Only measurements considered scientifically relevant are shown below by default.

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Measurement	Units	Variable
Altitude above mean sea level	m	alt
Background signal, copol data	Counts/microsecond	background_signal_co_pol ( time )
Background signal, cross pol data	Counts/microsecond	background_signal_cross_pol ( time )
Background signal standard deviation, copol data	Counts/microsecond	background_signal_std_co_pol ( time )
Background signal standard deviation, cross pol data	Counts/microsecond	background_signal_std_cross_pol ( time )
Base time in Epoch	seconds since 1970-1-1 0:00:00 0:00	base_time
Dead time correction flag	unitless	dead_time_corrected ( time )
Deadtime correction factor	unitless	deadtime_correction ( num_deadtime_corr )
Laboratory measured counts used to calculate the deadtime correction samples	kc/s	deadtime_correction_counts ( num_deadtime_corr )
Detector temperature	C	detector_temp ( time )
Energy output per pulse of transmitted laser beam at 532 nm (Doubled Nd-YLF)	uJ	energy_monitor ( time )
Bin number of first data. Tells where pretrigger timing ends and end of region for background data sampling	unitless	first_data_bin ( time )
Height above ground of the center of corresponding range_bin	km	height ( range_bins )
Bin number associated with zero height and time where laser transmit occurs	unitless	laser_fire_bin ( time )
Laser temperature	C	laser_temp ( time )
North latitude	degree_N	lat
East longitude	degree_E	lon
Maximum altitude retrieved from multichannel scalar card.	km	max_altitude
MCS mode register, value is either 167 or 199.	unitless	mcs_mode
Number of bins stored in data block	count	num_bins
Number of detector channels	count	num_channels
Overlap correction factor	unitless	overlap_correction ( num_overlap_corr )
Heights for overlap correction	km	overlap_correction_heights ( num_overlap_corr )
Polarization control enabled flag	unitless	polarization_control ( time )
Polarization control voltage setting	volts	polarization_control_voltage ( time )
Cloud base height Preliminary cloud base height above ground level	km	preliminary_cbh ( time )
Repetition rate, or Trigger Frequency of the laser	Hz	pulse_rep
Quality check results on field: Detector temperature	unitless	qc_detector_temp ( time )
Quality check results on field: Energy output per pulse of transmitted laser beam at 532 nm (Doubled Nd-YLF)	unitless	qc_energy_monitor ( time )
Quality check results on field: Laser temperature	unitless	qc_laser_temp ( time )
Quality check results on field: Preliminary cloud base height above ground level	unitless	qc_preliminary_cbh ( time )
Quality check results on field: Distance between initial range_bin and the laser flash	unitless	qc_range_offset ( time )
Quality check results on field: Telescope temperature	unitless	qc_scope_temp ( time )
Quality check results on field: Attenuated backscatter, copol	unitless	qc_signal_return_co_pol ( time )
Quality check results on field: Attenuated backscatter, cross pol	unitless	qc_signal_return_cross_pol ( time )
Quality check results on field: Time offset from midnight	unitless	qc_time ( time )
Distance from transceiver to center of corresponding range_bin	km	range ( range_bins )
Time in seconds for each range bin of multichannel scalar card.	seconds	range_bin_time ( time )
Width of range-bins calculated from range_bin_time	km	range_bin_width ( time )
Distance from leading edge of first range bin to the center of each bin.	km	range_bins ( range_bins )
Distance between initial range_bin and the laser flash	km	range_offset ( time )
Telescope temperature	C	scope_temp ( time )
Number of laser pulses summed during averaging interval	count	shots_per_avg
Radar polarization Attenuated backscatter, copol	Counts/microsecond	signal_return_co_pol ( time, range_bins )
Radar polarization Attenuated backscatter, cross pol	Counts/microsecond	signal_return_cross_pol ( time, range_bins )
Time offset from midnight		time ( time )
Time offset from base_time		time_offset ( time )