Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-9
TLE Epoch: 2023 8 21.  Predictions up to the next  14.0 days:

     Date     Time(NOAA-21) NOAA-21 Lat/Lon Date Time(LANDSAT-9) LANDSAT-9 Lat/Lon    Distance(km)  Time Diff(sec)
 08/21/2023   07:34:02   ( -70.75,-118.53) 08/21/2023   07:35:10  ( -70.61,-116.64)   71.15                68
 08/21/2023   08:24:33   (  69.94,  50.05) 08/21/2023   08:24:47  (  69.97,  50.07)    2.59                14
 08/21/2023   09:15:15   ( -69.86,-142.51) 08/21/2023   09:14:17  ( -69.85,-142.46)    2.21                58
 08/23/2023   23:50:44   ( -70.01,  -1.60) 08/23/2023   23:51:51  ( -70.04,  -1.59)    3.09                67
 08/24/2023   00:41:28   (  69.89, 165.89) 08/24/2023   00:41:19  (  69.89, 165.83)    2.21                 9
 08/24/2023   01:32:05   ( -69.54, -26.28) 08/24/2023   01:30:53  ( -69.55, -26.99)   27.64                72
 08/26/2023   16:07:40   ( -69.97, 114.23) 08/26/2023   16:08:23  ( -69.99, 114.22)    3.09                43
 08/26/2023   16:58:25   (  69.90, -78.36) 08/26/2023   16:57:50  (  69.89, -78.29)    3.10                35
 08/29/2023   07:34:07   (  70.70,  61.52) 08/29/2023   07:35:15  (  70.57,  63.30)   67.41                68
 08/29/2023   08:24:36   ( -69.93,-129.95) 08/29/2023   08:24:55  ( -69.92,-130.01)    2.32                19
 08/29/2023   09:15:20   (  69.81,  37.53) 08/29/2023   09:14:22  (  69.81,  37.48)    1.94                58
 08/31/2023   23:50:51   (  70.04, 178.32) 08/31/2023   23:51:55  (  70.03, 178.39)    2.95                64
 09/01/2023   00:41:32   ( -69.90, -14.14) 09/01/2023   00:41:26  ( -69.87, -14.19)    3.13                 6
 09/01/2023   01:32:09   (  69.41, 153.88) 09/01/2023   01:30:58  (  69.48, 152.92)   38.51                71
 09/03/2023   16:07:45   (  69.97, -65.80) 09/03/2023   16:08:25  (  69.95, -65.83)    1.73                40
 09/03/2023   16:58:27   ( -69.87, 101.65) 09/03/2023   16:57:55  ( -69.86, 101.66)    1.96                32