Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-8
TLE Epoch: 2023 5 17.  Predictions up to the next  14.0 days:

     Date     Time(NOAA-21) NOAA-21 Lat/Lon Date Time(LANDSAT-8) LANDSAT-8 Lat/Lon    Distance(km)  Time Diff(sec)
 05/18/2023   14:52:24   (  70.18, -47.13) 05/18/2023   14:53:30  (  70.16, -47.15)    1.99                66
 05/18/2023   15:43:05   ( -70.04, 120.40) 05/18/2023   15:43:00  ( -70.05, 120.32)    2.76                 5
 05/18/2023   16:33:42   (  69.60, -71.63) 05/18/2023   16:32:31  (  69.67, -72.56)   36.51                71
 05/21/2023   07:09:18   (  70.13,  68.72) 05/21/2023   07:09:57  (  70.10,  68.65)    3.58                39
 05/21/2023   08:00:00   ( -70.04,-123.84) 05/21/2023   07:59:26  ( -70.05,-123.80)    1.64                34
 05/23/2023   22:35:39   ( -70.72,  16.23) 05/23/2023   22:36:49  ( -70.63,  17.65)   53.50                70
 05/23/2023   23:26:13   (  70.08,-175.45) 05/23/2023   23:26:24  (  70.08,-175.50)    2.03                11
 05/24/2023   00:16:55   ( -69.99,  -8.00) 05/24/2023   00:15:54  ( -69.97,  -8.02)    2.88                61
 05/26/2023   14:52:24   ( -70.16, 132.89) 05/26/2023   14:53:24  ( -70.15, 132.83)    2.74                60
 05/26/2023   15:43:08   (  70.04, -59.63) 05/26/2023   15:42:51  (  70.03, -59.69)    2.61                17
 05/26/2023   16:33:39   ( -69.37, 108.68) 05/26/2023   16:32:30  ( -69.43, 107.12)   61.18                69
 05/29/2023   07:09:19   ( -70.12,-111.30) 05/29/2023   07:09:50  ( -70.13,-111.30)    1.08                31
 05/29/2023   08:00:03   (  70.01,  56.18) 05/29/2023   07:59:17  (  70.02,  56.18)    0.63                46