Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NOAA-21
TLE Epoch: 2023 10 3.  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)
 10/04/2023   08:31:01   (  -0.00,-104.72) (   0.39,-106.52)  205.47                80
 10/05/2023   08:09:35   (  -0.00,-104.72) (  -0.60,-101.98)  310.91                80
 10/06/2023   20:31:31   (   0.00,-104.70) (  -0.56,-107.29)  295.58                80
 10/07/2023   20:15:26   (   0.00,-104.70) (   0.43,-102.76)  221.14                80
 10/09/2023   08:37:13   (  -0.01,-104.72) (   0.71,-108.03)  376.28                80
 10/10/2023   08:15:48   (  -0.01,-104.73) (  -0.29,-103.49)  140.35                80
 10/11/2023   20:37:43   (   0.01,-104.71) (  -0.91,-108.79)  465.97                80
 10/12/2023   20:21:38   (   0.01,-104.71) (   0.10,-104.26)   51.34                80
 10/15/2023   08:24:38   (   0.03,-104.75) (   0.08,-104.99)   27.32                80
 10/16/2023   08:03:13   (   0.03,-104.75) (  -0.93,-100.45)  489.49                80