Image Navigation and Registration (INR) Statistics

The GOES image navigation and registration 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
Ian.Ross@noaa.gov
Gage.Lachance@noaa.gov
Noah.Curtiss@noaa.gov
Dan.Goldberg@noaa.gov

Latest week (Monday to Monday) image navigation and registration statistical data for the operational GOES spacecraft can be obtained from the links below:

GOES-16	GOES-17	GOES-18
Navigation and Registration Summary	Navigation and Registration Summary	Navigation and Registration Summary

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

GOES-RSTU 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 table below outlines the GOES-RSTU 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.

The GOES-R series spacecraft and instruments continue the heritage of the NOAA GOES program to provide weather observation imagery on a continuous basis from geosynchronous orbit. Performance requirements have been upgraded for both the GOES-R series spacecraft as well as for the instruments. In general, most performance requirements have been reduced by half and in some cases the GOES-R series performance requirement is 1/5th of the legacy GOES N-Q requirement. Below provides a summary of the key INR performance metrics specified in the GOES-R Mission Requirements Document (MRD).

For the Advanced Baseline Imager (ABI), the INR performance assessments are based on a 24 hour operational period. The 99.73rd percentile of the samples evaluated should be less than the metric values shown [Mission Requirements Document (MRD)].

The Geosynchronous Lightning Mapper (GLM) navigation requirement is a 3-sigma bound defined as the average ± 3 times the square root of the variance for a population of 1000 consecutive observations [MRD].

The Solar Ultraviolet Imager (SUVI) has product pointing and mapping accuracy and uncertainty requirements stated in MRD-2045/2046 as the following:

• Pointing Accuracy: ± 3 arcmin (3 sigma) NS and EW of Sun center
• Stability during 60 seconds for NS and EW:
  • ± 2 arcsec (1 sigma)
  • ± 6 arcsec (3 sigma)
• Product Pointing Knowledge/Mapping Uncertainty: ± 2.5 arcsec

Navigation and Registration Summary
The ABI Imager "Navigation and Registration Summary" link presents tables summarizing the navigation and registration performance statistics in all pertinent categories for the week of interest for the ABI Imager instrument. The data presented is calculated from Full Disk scenes only.

The first two tables present the navigation performance of all landmarking bands of interest of the ABI. 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. Where possible, the ratio of the number of landmarks within specification to the total number of landmarks will be reported in parenthesis alongside the percentage values. The tables will be updated on a weekly basis for each operational spacecraft. The first table covers the VNIR bands (Band 1: 470nm, Band 2: 640 nm, Band 3: 865 nm, Band 5: 1610 nm and Band 6: 2250 nm). The second table covers the MWIR (Band 7: 3900 nm and Band 11: 8500 nm) and LWIR (Band 13: 10350nm, Band 14: 11200nm, Band 15: 12300nm and Band 16: 13300nm).

The plots that follow will provide a detailed breakdown of daily performance during the week of interest against the MRD specification.

The next two tables present the Frame-to-Frame performance of all landmarking bands of interest against MRD specification. The plots that follow will provide a detailed breakdown of daily performance during the week of interest against the MRD specification.

Subsequent tables in the reports will present additional INR metric performance against MRD specification.

ABI Band Resolution
Focal Plane Module	VNIR	MWIR	LWIR
Channel #	1   2   3   4   5   6	7   8   9   10   11	12   13   14   15   16
Resolution (km)	1   0.5   1   2   1   2	2   2   2   2   2	2   2   2   2   2
Wavelength (µ)	0.47   0.64   0.865   1.378   1.61   2.25	3.9   6.185   6.95   7.34   8.5	9.61   10.35   11.2   12.3   13.3
Geostationary Lightning Mapper Navigation
Navigation		5.0	140
GLM Resolution (design capability)		8 km x 8 km (variable over FOR)
Solar Ultraviolet Imager
Product Pointing/Mapping Accuracy
Pointing Accuracy (NS and EW of Sun center)		± 3 arcmin (3 sigma)
Stability during 60 seconds (NS and EW)		± 2 arcsec (1 sigma) ± 6 arcsec (3 sigma)
Product Pointing Knowledge/Mapping Uncertainty		± 2.5 arcsec

GOES-RSTU INR Requirement	MRD (km)	MRD (µrad)
Advanced Baseline Imager (applied over entire fixed grid)
Navigation	1	28.0*
Frame to Frame, 0.5 km to 1 km (VNIR Channels)	.75	21.0*
Frame to Frame, 2 km (MWIR, LWIR)	1	28.0*
Within Frame	1	28.0*
Swath to Swath Registration	0.28	7.84
Co-registration, 0.5 km to 1 km (Visible to VNIR Channels)	0.25	7.0
Co-registration, 1 km to 1 km (VNIR to VNIR Channels)	0.25	7.0
Co-registration, 0.5 km to 2 km (Visible to MWIR/LWIR Channels)	0.40	11.2
Co-registration, 1 km to 2 km (VNIR to MWIR/LWIR Channels)	0.40	11.2
Co-registration, 2 km to 2 km (MWIR/LWIR to MWIR/LWIR Channels)	0.40	11.2
* MRD523: The GOES-R System shall navigate Radiance product observations with errors not to exceed 1.5 kilometer (3-σ) at SSP, during eclipse.