Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NOAA-21
TLE Epoch: 2023 4 28.  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)
 04/28/2023   08:10:05   (   0.00,-104.73) (  -0.61,-101.92)  320.30                80
 04/29/2023   20:32:02   (  -0.00,-104.73) (  -0.58,-107.23)  285.00                80
 04/30/2023   20:15:59   (  -0.00,-104.73) (   0.46,-102.71)  231.16                80
 05/02/2023   08:37:47   (  -0.00,-104.74) (   0.75,-107.98)  369.72                80
 05/03/2023   08:16:24   (  -0.00,-104.74) (  -0.30,-103.46)  146.22                80
 05/04/2023   20:38:21   (   0.00,-104.73) (  -0.88,-108.77)  459.34                80
 05/05/2023   20:22:17   (   0.00,-104.73) (   0.11,-104.24)   56.67                80
 05/08/2023   08:25:21   (  -0.01,-104.73) (   0.03,-104.99)   29.04                80
 05/09/2023   08:03:57   (  -0.02,-104.73) (  -0.97,-100.46)  486.25                80
 05/10/2023   20:25:53   (   0.01,-104.71) (  -0.24,-105.76)  120.19                80
 05/11/2023   20:09:49   (   0.01,-104.71) (   0.76,-101.23)  395.69                80