Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-9
TLE Epoch: 2023 7 30.  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)
 07/30/2023   23:51:02   (  70.00, 178.37) 07/30/2023   23:51:40  (  69.99, 178.34)    1.42                38
 07/31/2023   00:41:44   ( -69.91, -14.17) 07/31/2023   00:41:09  ( -69.93, -14.11)    3.21                35
 08/02/2023   15:17:25   ( -70.89, 125.44) 08/02/2023   15:18:32  ( -70.76, 127.70)   83.92                67
 08/02/2023   16:07:54   (  69.99, -65.84) 08/02/2023   16:08:11  (  70.01, -65.76)    3.27                17
 08/02/2023   16:58:35   ( -69.85, 101.70) 08/02/2023   16:57:42  ( -69.84, 101.64)    2.72                53
 08/05/2023   07:34:03   ( -70.15,-117.60) 08/05/2023   07:35:15  ( -70.09,-117.40)    9.73                72
 08/05/2023   08:24:45   (  69.94,  50.03) 08/05/2023   08:24:43  (  69.94,  50.02)    0.09                 2
 08/05/2023   09:15:26   ( -69.79,-142.43) 08/05/2023   09:14:13  ( -69.83,-142.50)    4.87                73
 08/07/2023   23:50:51   ( -69.99,  -1.59) 08/07/2023   23:51:46  ( -70.01,  -1.65)    2.69                55
 08/08/2023   00:41:35   (  69.89, 165.88) 08/08/2023   00:41:13  (  69.90, 165.85)    1.53                22
 08/08/2023   01:32:03   ( -69.05, -25.60) 08/08/2023   01:30:55  ( -69.13, -27.55)   78.18                68
 08/10/2023   16:07:43   ( -70.00, 114.18) 08/10/2023   16:08:16  ( -70.00, 114.23)    1.84                33
 08/10/2023   16:58:26   (  69.85, -78.28) 08/10/2023   16:57:44  (  69.84, -78.36)    3.26                42