Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NOAA-21
TLE Epoch: 2023 1 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)
 01/25/2023   21:36:51   (  -0.02,-121.28) (  -0.45,-123.23)  222.20                80
 01/26/2023   21:20:42   (  -0.02,-120.13) (   0.32,-118.65)  169.18                80
 01/29/2023   09:20:52   (   0.02,-117.20) (   0.45,-119.25)  232.32                80
 01/30/2023   09:04:42   (   0.02,-116.05) (  -0.27,-114.65)  158.84                80
 02/01/2023   21:05:01   (  -0.03,-113.13) (  -0.52,-115.28)  245.38                80
 02/02/2023   20:48:51   (  -0.03,-111.98) (   0.27,-110.70)  145.62                80
 02/05/2023   08:49:01   (   0.03,-109.04) (   0.52,-111.29)  256.42                80
 02/06/2023   08:32:51   (   0.03,-107.88) (  -0.21,-106.70)  134.63                80