Zond 6 (Jodrell Bank tape #42, November 1968): extracted data
Produced by zond6.py from zond6.mp3 (https://www.jb.man.ac.uk/multimedia/audio/zond6.html, CC BY-NC-ND 4.0,
Jodrell Bank Centre for Astrophysics, University of Manchester). The audio itself is not included.
All times are seconds into that MP3. Envelope tracks use a 44-sample step at 22050 Hz (1.9955 ms).

words.csv    one row per data second (a ~2451 Hz marker on the one-second rhythm)
  n               index
  tape_time_s     marker onset, seconds into the MP3
  tape_mmss       same, as m:ss.sss
  section         which voice-free stretch: before the Moon (~01:51 UT) or after it (~03:25 UT)
  word_b0_to_b7   bits read from 8 cells after the marker (b0 first); 1 = ~978 Hz pulse
  off_grid_pulse  1 if any pulse in this second starts more than 20 ms from the full-cell grid
  fill_b0..b7     fraction of each cell's first 80 ms in which the ~978 Hz tone is on (bit = 1 if > 0.5)

pulses.csv   one row per ~978 Hz pulse inside a data second
  n                    data-second index (matches words.csv)
  marker_onset_tape_s  marker onset, seconds into the MP3
  marker_ms            measured marker length (the envelope filter adds ~10 ms)
  pulse_start_ms       pulse start after the marker onset
  pulse_end_ms         pulse end after the marker onset
  cell                 nearest full cell on the fitted grid
  grid_residual_ms     pulse start minus that cell's start

summary.json  tone frequencies, the second (slot), grid fit, chance test (random starts, 200 trials) and
              decoder agreement (method A: cell fill thresholds; method B: 978 Hz vs 700 Hz power margin).