Keywords used in the RLDB

These (or parts of these) are the only valid strings to enter in the "keyword"-fields.

     44	ablation theory
      3	amplitude
      9	amplitude distribution
      1	antenna
      7	antenna theory
     32	atmosphere
     10	attachment
     12	chemistry
     14	communication
     27	comparison optical
     12	deceleration
     48	diffusion
      1	difusion
      5	doppler
     18	duration
     16	duration distribution
      1	echo ceiling
     79	echo rate
      1	echo rates
     23	flux
    107	forward scatter
     15	fragmentation
     40	fresnel
     22	hardware
     18	head echo
     19	height
     18	height distribution
      8	history
     15	initial radius
      3	instrumental errors
      5	interference identification
      9	interferometer
     17	interpretation errors
     26	introduction
     27	ionosphere
      4	irregular ionization
      1	kinetics
     11	low frequency
      1	mass
     35	mass distribution
      1	meteor streams
      1	observability function
     44	observational setup
    180	observations
     14	optical
     21	orbit
     58	overdense
     10	polarization
     33	radiant
      1	radio emission
      7	recombination
     55	reduction
      6	resonance
     73	scatter theory
      7	software
      9	solar activity
     19	sporadic E
     30	sporadic meteors
      7	sunrise
     10	time difference
     11	turbulence
     56	underdense
     35	velocity
     36	wind