Table 4 Description of data channels in corrected data set.
Channel	Name	Units	Description
1	x utm	m	UTM easting4
2	y utm	m	UTM northing
3	fid	-	fiducial number
4	flight	-	flight number
5	bird alt	m	corrected altitude of bird
6	cxi900	ppm	992 Hz VCX coil-pair inphase
7	cxq900	ppm	992 Hz VCX coil-pair quadrature
8	cpi900	ppm	874 Hz HCP coil-pair inphase5
9	cpq900	ppm	874 Hz HCP coil-pair quadrature
10	cxi5000	ppm	5655 Hz VCX coil-pair inphase
11	cxq5000	ppm	5655 Hz VCX coil-pair quadrature
12	cpi7200	ppm	7342 Hz HCP coil-pair inphase
13	cpq7200	ppm	7342 Hz HCP coil-pair quadrature
14	cpi56k	ppm	55780 Hz HCP coil-pair inphase
15	cpq56k	ppm	55780 Hz HCP coil-pair quadrature
4UTM coordinates are given in NAD83 and are in zone 17. 5All inphase and quadrature channels are in true ppm. To obtain Dighem ppm for the HCP channels, divide the corrected value by 2.

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