Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and NOAA-19
TLE Epoch: 2023 4 1.  Predictions up to the next  14.0 days:

     Date     Time(NOAA-21) NOAA-21 Lat/Lon Date Time(NOAA-19) NOAA-19 Lat/Lon    Distance(km)  Time Diff(sec)
 04/09/2023   02:44:52   ( -75.20, -55.39) 04/09/2023   02:43:41  ( -75.18, -57.04)   47.04                71
 04/09/2023   03:35:43   (  75.46, 111.15) 04/09/2023   03:34:31  (  75.47, 111.18)    1.68                72
 04/09/2023   04:26:27   ( -75.45, -81.51) 04/09/2023   04:25:34  ( -75.46, -81.62)    3.45                53
 04/09/2023   05:17:13   (  75.47,  85.74) 04/09/2023   05:16:30  (  75.48,  85.72)    1.71                43
 04/09/2023   06:07:58   ( -75.51,-107.06) 04/09/2023   06:07:33  ( -75.47,-107.08)    3.72                25
 04/09/2023   06:58:43   (  75.48,  60.34) 04/09/2023   06:58:29  (  75.49,  60.26)    2.73                14
 04/09/2023   07:49:28   ( -75.52,-132.46) 04/09/2023   07:49:31  ( -75.53,-132.38)    2.65                 3
 04/09/2023   08:40:14   (  75.54,  34.78) 04/09/2023   08:40:28  (  75.50,  34.80)    3.68                14
 04/09/2023   09:30:58   ( -75.53,-157.87) 04/09/2023   09:31:30  ( -75.54,-157.84)    1.76                32
 04/09/2023   10:21:44   (  75.55,   9.38) 04/09/2023   10:22:26  (  75.56,   9.49)    3.39                42
 04/09/2023   11:12:28   ( -75.54, 176.73) 04/09/2023   11:13:29  ( -75.55, 176.70)    1.80                61
 04/09/2023   12:03:14   (  75.56, -16.03) 04/09/2023   12:04:25  (  75.57, -15.97)    2.16                71