Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NOAA-21
TLE Epoch: 2023 9 27.  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)   34.13                80
 09/30/2023   08:03:23   (   0.00,-104.72) (  -0.96,-100.48)  482.75                80
 10/01/2023   20:25:18   (  -0.01,-104.70) (  -0.27,-105.78)  123.92                80
 10/02/2023   20:09:13   (  -0.02,-104.70) (   0.77,-101.25)  393.22                80
 10/04/2023   08:31:00   (   0.02,-104.73) (   0.45,-106.51)  203.37                80
 10/05/2023   08:09:35   (   0.02,-104.73) (  -0.60,-101.99)  313.33                80
 10/06/2023   20:31:31   (  -0.02,-104.71) (  -0.61,-107.28)  294.01                80
 10/07/2023   20:15:26   (  -0.02,-104.71) (   0.44,-102.76)  223.00                80
 10/09/2023   08:37:12   (   0.01,-104.75) (   0.76,-108.02)  373.16                80
 10/10/2023   08:15:48   (   0.01,-104.76) (  -0.30,-103.50)  143.79                80