Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-8
TLE Epoch: 2022 12 9.  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)
 12/09/2022   01:42:44   (  70.14, 150.74) 12/09/2022   01:43:43  (  70.17, 150.71)    3.13                59
 12/09/2022   02:33:16   ( -70.05, -41.76) 12/09/2022   02:33:13  ( -70.05, -41.83)    2.66                 3
 12/09/2022   03:23:56   (  69.71, 126.06) 12/09/2022   03:22:44  (  69.73, 125.37)   26.70                72
 12/11/2022   22:06:45   ( -70.14,  24.75) 12/11/2022   22:07:25  ( -70.16,  24.77)    2.86                40
 12/11/2022   22:57:29   (  70.02,-167.76) 12/11/2022   22:56:53  (  70.00,-167.81)    2.13                36
 12/11/2022   23:47:44   ( -69.01,   1.04) 12/11/2022   23:46:38  ( -69.06,  -1.44)   98.82                66
 12/14/2022   17:40:21   ( -70.66,  90.56) 12/14/2022   17:41:31  ( -70.53,  91.75)   46.42                70
 12/14/2022   18:30:56   (  70.08,-101.21) 12/14/2022   18:31:04  (  70.09,-101.24)    1.65                 8
 12/14/2022   19:21:28   ( -69.97,  66.31) 12/14/2022   19:20:34  ( -69.98,  66.24)    3.06                54
 12/17/2022   14:04:24   (  70.16, -34.70) 12/17/2022   14:05:16  (  70.16, -34.70)    0.84                52
 12/17/2022   14:54:56   ( -70.04, 132.85) 12/17/2022   14:54:46  ( -70.05, 132.78)    3.06                10
 12/17/2022   15:45:31   (  69.46, -58.99) 12/17/2022   15:44:21  (  69.50, -60.34)   52.55                70
 12/20/2022   09:38:08   (  71.11,  30.41) 12/20/2022   09:39:13  (  71.02,  33.04)   95.23                65
 12/20/2022   10:28:24   ( -70.12,-160.63) 12/20/2022   10:28:57  ( -70.15,-160.63)    3.31                33
 12/20/2022   11:19:08   (  70.05,   6.79) 12/20/2022   11:18:24  (  70.03,   6.85)    2.73                44