Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and NOAA-19
TLE Epoch: 2023 5 12.  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)
 05/23/2023   05:42:04   ( -74.95, -99.07) 05/23/2023   05:40:53  ( -74.98,-100.60)   44.34                71
 05/23/2023   06:32:56   (  75.24,  67.38) 05/23/2023   06:31:43  (  75.25,  67.49)    3.10                73
 05/23/2023   07:23:40   ( -75.24,-125.28) 05/23/2023   07:22:47  ( -75.22,-125.36)    2.82                53
 05/23/2023   08:14:26   (  75.25,  41.99) 05/23/2023   08:13:42  (  75.25,  42.01)    0.70                44
 05/23/2023   09:05:10   ( -75.24,-150.67) 05/23/2023   09:04:45  ( -75.27,-150.69)    3.50                25
 05/23/2023   09:55:56   (  75.25,  16.61) 05/23/2023   09:55:41  (  75.26,  16.54)    2.04                15
 05/23/2023   10:46:41   ( -75.29,-176.19) 05/23/2023   10:46:44  ( -75.28,-176.17)    1.90                 3
 05/23/2023   11:37:27   (  75.31,  -8.92) 05/23/2023   11:37:39  (  75.31,  -8.79)    3.70                12
 05/23/2023   12:28:11   ( -75.30, 158.42) 05/23/2023   12:28:43  ( -75.28, 158.35)    2.52                32
 05/23/2023   13:18:57   (  75.31, -34.31) 05/23/2023   13:19:38  (  75.32, -34.27)    1.31                41
 05/23/2023   14:09:41   ( -75.30, 133.03) 05/23/2023   14:10:41  ( -75.33, 133.02)    3.48                60
 05/23/2023   15:00:27   (  75.31, -59.70) 05/23/2023   15:01:37  (  75.32, -59.75)    1.56                70
 05/23/2023   15:51:24   ( -75.91, 105.73) 05/23/2023   15:52:29  ( -75.84, 109.22)   95.26                65