Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NOAA-21
TLE Epoch: 2023 1 20.  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)
 01/22/2023   09:52:41   (   0.02,-125.34) (   0.43,-127.18)  210.30                80
 01/23/2023   09:36:32   (   0.02,-124.18) (  -0.34,-122.60)  180.82                80
 01/25/2023   21:36:51   (  -0.02,-121.28) (  -0.43,-123.24)  222.61                80
 01/26/2023   21:20:42   (  -0.02,-120.13) (   0.34,-118.65)  168.69                80
 01/29/2023   09:20:52   (   0.02,-117.20) (   0.49,-119.24)  233.29                80
 01/30/2023   09:04:42   (   0.02,-116.04) (  -0.29,-114.66)  157.74                80
 02/01/2023   21:05:01   (  -0.03,-113.12) (  -0.50,-115.29)  246.42                80
 02/02/2023   20:48:52   (  -0.03,-111.97) (   0.28,-110.70)  144.48                80