Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-8
TLE Epoch: 2023 11 27.  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)
 11/29/2023   08:00:02   ( -69.93,-123.89) 11/29/2023   08:00:30  ( -69.91,-123.89)    1.52                28
 11/29/2023   08:50:46   (  69.82,  43.58) 11/29/2023   08:49:57  (  69.81,  43.61)    1.40                49
 12/01/2023   23:26:17   (  70.03,-175.61) 12/01/2023   23:27:27  (  70.04,-175.46)    5.51                70
 12/02/2023   00:16:58   ( -69.88,  -8.06) 12/02/2023   00:16:58  ( -69.87,  -8.06)    0.60                 0
 12/02/2023   01:07:39   (  69.61, 159.65) 12/02/2023   01:06:27  (  69.66, 159.28)   14.90                72
 12/04/2023   15:43:11   (  69.95, -59.71) 12/04/2023   15:43:54  (  69.96, -59.69)    1.18                43
 12/04/2023   16:33:53   ( -69.84, 107.76) 12/04/2023   16:33:24  ( -69.85, 107.79)    1.16                29
 12/07/2023   07:09:35   ( -70.66,-112.36) 12/07/2023   07:10:44  ( -70.55,-110.59)   66.63                69
 12/07/2023   08:00:06   (  69.87,  56.17) 12/07/2023   08:00:21  (  69.88,  56.10)    2.95                15
 12/07/2023   08:50:48   ( -69.77,-136.36) 12/07/2023   08:49:51  ( -69.78,-136.41)    2.49                57
 12/09/2023   23:26:18   ( -69.96,   4.49) 12/09/2023   23:27:20  ( -69.94,   4.44)    2.91                62
 12/10/2023   00:17:02   (  69.86, 171.95) 12/10/2023   00:16:46  (  69.88, 172.00)    2.67                16
 12/10/2023   01:07:35   ( -69.28, -19.88) 12/10/2023   01:06:24  ( -69.34, -21.11)   48.67                71