Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-9
TLE Epoch: 2025 8 4.  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)
 08/04/2025   22:12:05   (  70.15,-156.79) 08/04/2025   22:13:00  (  70.14,-156.72)    2.73                55
 08/04/2025   23:02:47   ( -70.04,  10.70) 08/04/2025   23:02:30  ( -70.03,  10.75)    2.00                17
 08/04/2025   23:53:17   (  69.20, 179.23) 08/04/2025   23:52:09  (  69.27, 177.35)   74.44                68
 08/07/2025   14:28:59   (  70.08, -40.91) 08/07/2025   14:29:33  (  70.06, -40.96)    2.73                34
 08/07/2025   15:19:41   ( -69.96, 126.58) 08/07/2025   15:19:03  ( -69.96, 126.52)    2.44                38
 08/10/2025   05:55:20   ( -70.68, -93.39) 08/10/2025   05:56:30  ( -70.57, -91.99)   53.15                70
 08/10/2025   06:45:54   (  70.07,  74.87) 08/10/2025   06:46:04  (  70.08,  74.94)    2.75                10
 08/10/2025   07:36:36   ( -69.95,-117.62) 08/10/2025   07:35:35  ( -69.92,-117.65)    3.23                61
 08/12/2025   22:12:05   ( -70.14,  23.22) 08/12/2025   22:13:09  ( -70.14,  23.25)    1.30                64
 08/12/2025   23:02:48   (  70.01,-169.27) 08/12/2025   23:02:36  (  70.03,-169.26)    1.45                12
 08/12/2025   23:53:22   ( -69.52,  -1.21) 08/12/2025   23:52:11  ( -69.60,  -2.23)   40.28                71
 08/15/2025   14:28:58   ( -70.09, 139.08) 08/15/2025   14:29:40  ( -70.07, 139.03)    2.71                42
 08/15/2025   15:19:41   (  69.96, -53.41) 08/15/2025   15:19:07  (  69.96, -53.48)    2.67                34