Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NOAA-21
TLE Epoch: 2023 9 28.  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)
 09/29/2023   08:24:47   (  -0.00,-104.71) (   0.08,-105.01)   34.37                80
 09/30/2023   08:03:23   (   0.00,-104.71) (  -0.96,-100.48)  482.38                80
 10/01/2023   20:25:19   (  -0.00,-104.69) (  -0.22,-105.79)  124.34                80
 10/02/2023   20:09:13   (  -0.00,-104.70) (   0.77,-101.25)  392.66                80
 10/04/2023   08:31:01   (   0.00,-104.73) (   0.39,-106.52)  204.25                80
 10/05/2023   08:09:35   (   0.00,-104.73) (  -0.60,-101.99)  312.36                80
 10/06/2023   20:31:32   (  -0.00,-104.70) (  -0.56,-107.30)  294.97                80
 10/07/2023   20:15:26   (   0.00,-104.71) (   0.43,-102.76)  222.00                80
 10/09/2023   08:37:13   (  -0.00,-104.75) (   0.72,-108.03)  374.14                80
 10/10/2023   08:15:48   (   0.00,-104.75) (  -0.28,-103.50)  142.85                80
 10/11/2023   20:37:43   (  -0.00,-104.72) (  -0.92,-108.79)  464.09                80