Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NOAA-21
TLE Epoch: 2023 10 20.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NOAA-21 Lat/Lon    Distance(km)  Time Diff(sec)
 10/21/2023   08:09:30   (  -0.00,-104.69) (  -0.59,-101.97)  309.88                80
 10/22/2023   20:31:29   (  -0.00,-104.66) (  -0.60,-107.28)  299.74                80
 10/23/2023   20:15:27   (   0.00,-104.65) (   0.43,-102.77)  215.47                80
 10/25/2023   08:37:17   (  -0.00,-104.68) (   0.75,-108.05)  383.66                80
 10/26/2023   08:15:55   (  -0.00,-104.68) (  -0.28,-103.53)  131.60                80
 10/27/2023   20:37:53   (   0.00,-104.64) (  -0.96,-108.83)  477.79                80
 10/28/2023   20:21:50   (  -0.00,-104.64) (   0.08,-104.31)   37.74                80
 10/31/2023   08:24:57   (   0.00,-104.67) (   0.11,-105.06)   45.64                80
 11/01/2023   08:03:35   (   0.00,-104.66) (  -0.93,-100.55)  469.65                80
 11/02/2023   20:25:33   (   0.01,-104.63) (  -0.28,-105.86)  140.40                80
 11/03/2023   20:09:31   (   0.01,-104.63) (   0.76,-101.34)  375.13                80