Simultaneous Nadir Overpasses (SNOs) between LANDSAT-8 and NPP
TLE Epoch: 2021 5 15.  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)
 05/17/2021   06:58:00   (  70.08,  71.84) 05/17/2021   06:57:13  (  70.10,  71.90)    3.31                47
 05/17/2021   07:47:29   ( -70.02,-120.61) 05/17/2021   07:47:55  ( -70.00,-120.64)    2.20                26
 05/19/2021   22:24:49   ( -70.99,  21.43) 05/19/2021   22:23:42  ( -71.03,  18.85)   93.42                67
 05/19/2021   23:14:31   (  70.06,-172.30) 05/19/2021   23:14:10  (  70.08,-172.32)    2.26                21
 05/20/2021   00:04:01   ( -69.96,  -4.82) 05/20/2021   00:04:51  ( -69.93,  -4.77)    3.16                50
 05/22/2021   14:41:35   ( -70.16, 136.06) 05/22/2021   14:40:22  ( -70.13, 136.07)    2.94                73
 05/22/2021   15:31:02   (  70.05, -56.45) 05/22/2021   15:31:06  (  70.02, -56.46)    2.88                 4
 05/22/2021   16:20:34   ( -69.83, 110.88) 05/22/2021   16:21:46  ( -69.82, 111.17)   11.29                72
 05/25/2021   06:58:05   ( -70.14,-108.09) 05/25/2021   06:57:18  ( -70.12,-108.15)    2.90                47
 05/25/2021   07:47:33   (  69.97,  59.32) 05/25/2021   07:48:01  (  69.96,  59.40)    3.15                28
 05/27/2021   22:24:54   (  70.87,-158.75) 05/27/2021   22:23:46  (  70.90,-160.96)   80.40                68
 05/27/2021   23:14:37   ( -70.06,   7.67) 05/27/2021   23:14:14  ( -70.06,   7.71)    1.20                23
 05/28/2021   00:04:04   (  69.94, 175.16) 05/28/2021   00:04:58  (  69.96, 175.17)    1.68                54