Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NOAA-21
TLE Epoch: 2023 5 16.  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)
 05/16/2023   20:16:07   (  -0.00,-104.73) (   0.41,-102.76)  223.84                80
 05/18/2023   08:37:55   (   0.00,-104.73) (   0.76,-108.03)  376.85                80
 05/19/2023   08:16:31   (   0.00,-104.73) (  -0.25,-103.50)  139.28                80
 05/20/2023   20:38:28   (   0.00,-104.73) (  -0.92,-108.82)  465.88                80
 05/21/2023   20:22:23   (   0.01,-104.73) (   0.09,-104.29)   50.40                80
 05/24/2023   08:25:27   (  -0.02,-104.74) (   0.06,-105.03)   33.99                80
 05/25/2023   08:04:03   (  -0.02,-104.74) (  -0.95,-100.50)  482.19                80
 05/26/2023   20:26:00   (   0.02,-104.74) (  -0.20,-105.82)  122.80                80
 05/27/2023   20:09:56   (   0.02,-104.74) (   0.81,-101.29)  393.92                80
 05/29/2023   08:31:43   (  -0.02,-104.75) (   0.40,-106.55)  205.62                80
 05/30/2023   08:10:18   (  -0.02,-104.76) (  -0.61,-102.02)  310.88                80