Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and NOAA-19
TLE Epoch: 2023 4 17.  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)
 04/23/2023   18:36:02   ( -75.40,  66.20) 04/23/2023   18:34:50  ( -75.39,  66.28)    2.52                72
 04/23/2023   19:26:47   (  75.37,-126.40) 04/23/2023   19:25:44  (  75.38,-126.48)    2.41                63
 04/23/2023   20:17:32   ( -75.42,  40.79) 04/23/2023   20:16:49  ( -75.40,  40.82)    1.64                43
 04/23/2023   21:08:17   (  75.39,-151.81) 04/23/2023   21:07:43  (  75.39,-151.95)    3.91                34
 04/23/2023   21:59:02   ( -75.43,  15.38) 04/23/2023   21:58:48  ( -75.41,  15.35)    1.99                14
 04/23/2023   22:49:48   (  75.45,-177.36) 04/23/2023   22:49:41  (  75.44,-177.26)    2.79                 7
 04/23/2023   23:40:32   ( -75.44, -10.03) 04/23/2023   23:40:47  ( -75.42, -10.11)    3.18                15
 04/24/2023   00:31:18   (  75.46, 157.23) 04/24/2023   00:31:40  (  75.45, 157.27)    1.32                22
 04/24/2023   01:22:02   ( -75.45, -35.44) 04/24/2023   01:22:45  ( -75.47, -35.43)    2.73                43
 04/24/2023   02:12:48   (  75.47, 131.82) 04/24/2023   02:13:39  (  75.46, 131.81)    0.87                51
 04/24/2023   03:03:32   ( -75.46, -60.85) 04/24/2023   03:04:44  ( -75.48, -60.89)    2.76                72
 04/24/2023   03:54:23   (  75.71, 105.67) 04/24/2023   03:55:34  (  75.65, 106.95)   35.97                71