suggested attributes for scan object

[EvanBianco]

# file header properties
jeepr.header.project
jeepr.header.date
jeepr.header.name
jeepr.header.num_channels  # 3
jeepr.header.channels          # e.g. "{'ch1': '1.0 GHz', 'Ch2': '0.5 GHz', etc. }

# survey properties
jeepr.survey.crs
jeepr.survey.elevation_datum
jeepr.survey.trace_interval
jeepr.survey.coordinates_of_first_trace    # ideally an x,y,z tuple
jeepr.survey.coordinates_of_last_trace    # ideally an x,y,z tuple
jeepr.survey.ntraces 

# Channel specific attributes
jeepr.scan.channel_no   
jeepr.scan.channel_name                         
jeepr.scan.nominal_source_frequency
jeepr.scan.tx_rx_spacing
jeepr.scan.sample_rate_s         # sample rate in seconds (would make more generic)
jeepr.scan.data