Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and NOAA-19
TLE Epoch: 2023 6 20.  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)
 06/21/2023   18:29:29   ( -74.60,  69.96) 06/21/2023   18:28:21  ( -74.63,  67.40)   75.52                68
 06/21/2023   19:20:25   (  75.09,-124.11) 06/21/2023   19:19:14  (  75.09,-123.99)    3.35                71
 06/21/2023   20:11:09   ( -75.09,  43.23) 06/21/2023   20:10:10  ( -75.10,  43.30)    2.45                59
 06/21/2023   21:01:55   (  75.10,-149.50) 06/21/2023   21:01:13  (  75.09,-149.48)    1.00                42
 06/21/2023   21:52:39   ( -75.09,  17.84) 06/21/2023   21:52:09  ( -75.10,  17.82)    1.06                30
 06/21/2023   22:43:25   (  75.10,-174.89) 06/21/2023   22:43:12  (  75.09,-174.96)    2.39                13
 06/21/2023   23:34:09   ( -75.10,  -7.55) 06/21/2023   23:34:08  ( -75.10,  -7.67)    3.43                 1
 06/22/2023   00:24:55   (  75.11, 159.72) 06/22/2023   00:25:10  (  75.14, 159.70)    3.63                15
 06/22/2023   01:15:40   ( -75.15, -33.08) 06/22/2023   01:16:06  ( -75.15, -33.02)    1.91                26
 06/22/2023   02:06:26   (  75.16, 134.19) 06/22/2023   02:07:09  (  75.15, 134.21)    2.22                43
 06/22/2023   02:57:10   ( -75.16, -58.47) 06/22/2023   02:58:05  ( -75.15, -58.50)    1.04                55
 06/22/2023   03:47:56   (  75.17, 108.80) 06/22/2023   03:49:08  (  75.15, 108.72)    3.28                72
 06/22/2023   04:38:48   ( -75.54, -85.01) 06/22/2023   04:39:57  ( -75.47, -82.96)   57.40                69