Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NOAA-21
TLE Epoch: 2023 4 24.  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)
 04/24/2023   20:25:49   (  -0.00,-104.74) (  -0.23,-105.72)  112.05                80
 04/25/2023   20:09:43   (  -0.00,-104.74) (   0.80,-101.18)  405.25                80
 04/27/2023   08:31:27   (   0.00,-104.74) (   0.37,-106.44)  194.11                80
 04/28/2023   08:10:00   (   0.00,-104.73) (  -0.61,-101.89)  323.12                80
 04/29/2023   20:31:53   (  -0.00,-104.74) (  -0.54,-107.19)  279.96                80
 04/30/2023   20:15:46   (  -0.00,-104.74) (   0.45,-102.65)  237.76                80
 05/02/2023   08:37:30   (  -0.00,-104.75) (   0.70,-107.91)  360.51                80
 05/03/2023   08:16:02   (  -0.00,-104.75) (  -0.30,-103.37)  157.03                80
 05/04/2023   20:37:55   (   0.00,-104.74) (  -0.88,-108.66)  446.23                80
 05/05/2023   20:21:47   (   0.00,-104.75) (   0.13,-104.12)   71.40                80
 05/08/2023   08:24:44   (  -0.02,-104.75) (  -0.01,-104.84)   10.17                80