Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NOAA-21
TLE Epoch: 2023 4 6.  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)
 04/06/2023   08:25:52   (  -0.00,-104.74) (   0.04,-105.06)   35.06                80
 04/07/2023   08:04:25   (  -0.00,-104.74) (  -0.95,-100.52)  481.74                80
 04/08/2023   20:26:20   (   0.00,-104.75) (  -0.21,-105.82)  121.38                80
 04/09/2023   20:10:13   (  -0.00,-104.74) (   0.79,-101.28)  395.35                80
 04/11/2023   08:31:59   (   0.00,-104.73) (   0.39,-106.54)  206.04                80
 04/12/2023   08:10:32   (   0.00,-104.72) (  -0.61,-102.00)  310.09                80
 04/13/2023   20:32:25   (  -0.00,-104.72) (  -0.60,-107.29)  294.14                80
 04/14/2023   20:16:19   (   0.00,-104.71) (   0.41,-102.75)  222.39                80
 04/16/2023   08:38:04   (  -0.00,-104.70) (   0.76,-108.02)  378.32                80
 04/17/2023   08:16:38   (  -0.00,-104.70) (  -0.25,-103.48)  138.24                80
 04/18/2023   20:38:32   (   0.00,-104.69) (  -0.88,-108.79)  465.66                80
 04/19/2023   20:22:25   (  -0.00,-104.69) (   0.07,-104.24)   51.45                80