Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NOAA-21
TLE Epoch: 2023 1 26.  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)
 01/26/2023   21:20:42   (  -0.01,-120.13) (   0.35,-118.65)  169.21                80
 01/29/2023   09:20:52   (   0.01,-117.21) (   0.48,-119.24)  231.95                80
 01/30/2023   09:04:42   (   0.01,-116.05) (  -0.30,-114.66)  159.27                80
 02/01/2023   21:05:01   (  -0.02,-113.14) (  -0.50,-115.29)  244.98                80
 02/02/2023   20:48:52   (  -0.02,-111.98) (   0.29,-110.70)  146.10                80
 02/05/2023   08:49:02   (   0.02,-109.05) (   0.52,-111.30)  255.64                80
 02/06/2023   08:32:52   (   0.02,-107.90) (  -0.27,-106.71)  135.47                80
 02/08/2023   20:33:10   (  -0.02,-104.98) (  -0.55,-107.34)  268.65                80