Simultaneous Nadir Overpasses (SNOs) between LANDSAT-8 and NPP
TLE Epoch: 2021 8 18.  Predictions up to the next  14.0 days:

     Date     Time(LANDSAT-8) LANDSAT-8 Lat/Lon Date Time(NPP) NPP Lat/Lon    Distance(km)  Time Diff(sec)
 08/18/2021   14:42:04   (  70.10, -44.00) 08/18/2021   14:41:25  (  70.10, -44.07)    2.47                39
 08/18/2021   15:31:34   ( -69.99, 123.47) 08/18/2021   15:32:06  ( -69.97, 123.45)    2.37                32
 08/21/2021   06:08:57   ( -70.74, -94.82) 08/21/2021   06:07:48  ( -70.77, -96.67)   67.55                69
 08/21/2021   06:58:35   (  70.03,  71.78) 08/21/2021   06:58:20  (  70.02,  71.83)    2.67                15
 08/21/2021   07:48:05   ( -69.93,-120.74) 08/21/2021   07:49:02  ( -69.93,-120.72)    0.84                57
 08/23/2021   22:25:38   ( -70.13,  20.15) 08/23/2021   22:24:32  ( -70.10,  20.16)    2.63                66
 08/23/2021   23:15:05   (  70.01,-172.36) 08/23/2021   23:15:17  (  70.04,-172.43)    3.50                12
 08/24/2021   00:04:41   ( -69.58,  -5.33) 08/24/2021   00:05:52  ( -69.58,  -4.43)   34.79                71
 08/26/2021   14:42:08   ( -70.05, 135.93) 08/26/2021   14:41:27  ( -70.07, 135.98)    2.50                41
 08/26/2021   15:31:35   (  69.94, -56.59) 08/26/2021   15:32:11  (  69.95, -56.54)    2.38                36
 08/29/2021   06:09:00   (  70.57,  84.93) 08/29/2021   06:07:50  (  70.61,  83.58)   49.82                70
 08/29/2021   06:58:38   ( -70.03,-108.22) 08/29/2021   06:58:23  ( -70.03,-108.20)    0.77                15
 08/29/2021   07:48:05   (  69.92,  59.26) 08/29/2021   07:49:07  (  69.92,  59.28)    1.00                62
 08/31/2021   22:25:38   (  70.10,-159.87) 08/31/2021   22:24:37  (  70.10,-159.86)    0.58                61
 08/31/2021   23:15:08   ( -70.01,   7.62) 08/31/2021   23:15:19  ( -70.00,   7.61)    0.55                11
 09/01/2021   00:04:44   (  69.39, 174.43) 09/01/2021   00:05:53  (  69.36, 175.86)   56.36                69