Parameters of the source:
a) identification
b) coordinates (
, 
), accurate to 1
c) epoch and reference for these coordinates
d) heliocentric radial velocity in km s
.
The convention 
is followed
e) number of wavelength ranges (between 1 and 64)
Parameters for each of the up to 64 spectral lines:
f) central wavelength of line in 
m
(
m)
g) expected source flux density in Jy of line plus continuum at
line wavelength
h) required signal-to-noise ratio SNR