Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NOAA-21
TLE Epoch: 2023 4 22.  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)
 04/23/2023   08:03:57   (  -0.00,-104.73) (  -0.97,-100.43)  490.91                80
 04/24/2023   20:25:50   (   0.00,-104.74) (  -0.21,-105.72)  112.20                80
 04/25/2023   20:09:43   (   0.00,-104.74) (   0.81,-101.19)  405.11                80
 04/27/2023   08:31:28   (  -0.00,-104.74) (   0.38,-106.44)  194.20                80
 04/28/2023   08:10:01   (   0.00,-104.74) (  -0.66,-101.91)  322.99                80
 04/29/2023   20:31:54   (   0.00,-104.74) (  -0.57,-107.19)  280.24                80
 04/30/2023   20:15:47   (   0.00,-104.74) (   0.47,-102.66)  237.39                80
 05/02/2023   08:37:31   (  -0.00,-104.75) (   0.71,-107.92)  361.03                80
 05/03/2023   08:16:05   (  -0.00,-104.75) (  -0.32,-103.38)  156.44                80
 05/04/2023   20:37:57   (   0.00,-104.75) (  -0.89,-108.67)  446.99                80
 05/05/2023   20:21:51   (  -0.00,-104.75) (   0.16,-104.13)   70.59                80