GOES Image Navigation and Registration (INR) Statistics
The INR information and data plots are generated by the NOAA EMOSS team. If you have any questions regarding the data on this web site please contact one of our team members:
Nathan.Sanders@noaa.gov
Casey.Thomas@noaa.gov
Ian.Ross@noaa.gov
Sam.M.Chen@noaa.gov
Latest week (Monday to Monday) INR statistical data for the operational GOES spacecraft can be obtained from the links below:
| GOES-14 |
| This is currently a placeholder and will be updated with statistical information in the case of GOES-14 going operational. |
Weekly Residuals:
NS Imager Landmark SSAA
EW Imager_Landmark SSAA
NS Imager/Sounder Star SSAA
EW Imager/Sounder Star SSAA |
GOES N-P INR Performance Statistics Explanation
This is provided to help explain some of the terminology and graphical output available on the GOES Image Navigation and Registration (INR) Performance Statistics web pages. In order to gain a fuller understanding of the data available, the tables below outline the GOES N-P INR Performance Specification. The primary purpose of the INR statistics plots is to provide a means of monitoring and trending INR performance as it relates to the defined specifications.
Weekly Residuals
The "Weekly Residual" plots depict all of the imager/sounder star and imager visible/IR landmark navigation errors for the entire week of interest. A residual is defined as the difference between the observed and predicted locations of a landmark or star measurement within the instrument field-of-view. These plots will be updated on a weekly basis for each operational spacecraft.
Navigation and Registration Summary
The Imager "Navigation and Registration Summary" links present tables summarizing the navigation and registration performance statistics in all pertinent categories for the week of interest for the Imager instrument. Presented in the tables are performance statistics for IR, Visible and Combined (indicating the combination of Visible and IR channel landmark measurements) and cover East-West and North-South statistics for navigation, within-frame (WIFR) and frame to frame (F2F) performance. The green color coded cells represent landmarks that are within three sigma (> 99.7%) of the specification. The red colored cells indicate performance outside of three sigma. The ratio of the number of landmarks within specification to the total number of landmarks is reported in parenthesis alongside the percentage values. The tables will be updated on a weekly basis for each operational spacecraft.
GOES-NOP Imager Normal Operations Performance, µrad, 3σ
[Source: Pspec (mod 205) INR error and ground system error]
(Earth Centered Angle 0 to 65 degrees) |
| |
N-S and E-W |
| Visible |
Infrared |
| Navigation |
55* |
86* |
| Within-Frame Registration, 25 minute |
57† |
83† |
Frame-to-Frame Registration:
15 minute
90 minute
24 hours |
41†
53†
115† |
73†
80†
130† |
† These values differ from the GOES-NOP Data Book, as they are based on updated performance specifications.
* Navigation specification differs from Pspec (mod 205), as it is based on the latest values as determined by operational updates and final negotiated specifications. |
For reference, the Imager performance specification as sourced from the GOES N Series Data Book, Revision D, February 2010 is presented below also.
GOES-NOP Imager Normal Operations Performance, µrad, 3σ
(GOES N Series Data Book, Revision D, February 2010, p19-9) |
| |
N-S and E-W |
| Navigation |
65* |
| Within-Frame Registration, 25 minute |
54 |
| Line-line shear (excluding Imager servo) |
20 |
Frame-Frame Registration:
15 minute
90 minute
24 hours |
36
49
114 |
| * equivalent to 2 km ground resolution at nadir |
