# Presentation: 576930

## Landsat Calibration and Validation Activities, Status, and Issues  

**Ron Hayes**** **
- Landsat Cal Val Task Lead
**Contract employee under ****U.S. Geological Survey ****contract 03CRCN0001**

**Landsat Science Team Meeting January 9****th****, 2007**
- hayes@usgs.gov
- 605-594-6531

## Topics

**Landsat Calibration Team**
**Landsat Calibration Overview**
**Image Assessment System (IAS)**
**Landsat 7 Calibration**
**Landsat 5 Calibration**
**Future Calibration Efforts**
**IGS Data Validation and Exchange**
**Spacecraft / Sensor Anomaly Investigations**

## Landsat Cal Val Personnel

**USGS  EROS****Calibration Team**
- Radiometry / Thermal
- Geometry
- Spatial
- IGS DV&E
**GSFC LPSO**
- Radiometry / Thermal
- Vicarious Calibration
**Vicarious Calibration**
- Ground Truth
**South Dakota State University**
- TM Cal Development
- MSS Cal Development
- TM & MSS Operations

_**Radiometry**_

_**Geometry / Spatial**_

_**IGS DV&E**_

**Pat Scaramuzza**

**Jim Storey**

**Rynn Lamb**

**Raj Rengarajan**

**Gyanesh Chander**

**Mike Choate**

**Esad Micijevic**

_**Task Lead**_

**Ron Hayes**

## EROS / LPSO / Vicarious Calibrations Group

**SDSU: Dr. Dennis Helder**

**USGS EROS**

**UAZ: Dr. Kurt Thome**

**JPL: Simon Hook**

**GSFC: LPSO**

**RIT: Dr. John Schott**

**CCRS: Dr. Phil Teillet**

**Lethbridge: Dr. Phil Teillet**

**Notes:**
So how does IAS do its job?

The two main processes within the IAS are the Radiometric Processing System (RPS) and the Geometric Processing System (GPS).  These algorithms serve two purposes.

One, they can take L0R Scene Data and its associated CPF, and process the data into a finished product through a series of intermediate steps.

In addition, they can calibrate the data, using calibration devices on the spacecraft and control sites on the ground, to produce new calibration parameters that are stored in the Trending Database.  A database query can pull either single parameters, a parameter’s mean, or a parameter’s extrapolated trend from the Trending Database.  If the operator chooses, the IAS can use the queried parameters in RPS and GPS processing to create the finished products.  So the IAS can create many variations of products, substituting calibration parameters and parameter trends, until the optimum values are found; these optimum values are then included into the CPF.

## Landsat Calibration Overview

**Characterize sensor performance **
- Conduct Daily Calibrations on L5 and L7 using IAS
- Populate a Trending Database
- Create Calibration Parameter Files (CPF’s)
- Validate Calibrations with Vicarious data collections
- Publish results
**Develop characterization, correction and calibration algorithms**
**Monitor Health and Welfare of the Systems (Anomaly Resolution)**
**Data Validation and Exchange for International Ground Stations (IGS’s)  **

**Calibrations for L7 with IAS**

**Radiometric**
- L1r Day Characterization
- L1r Night Characterization
- Full Aperture Solar Calibration
- Partial Aperture Solar Calibration
- Coherent Noise Analysis
**Geometric **
- Geodetic Accuracy Assessment
- Band to Band Alignment
- Sensor Alignment
- Scan Mirror Calibration / Bumper Mode
**Spatial**
- MTF Characterization

**Calibrations for L5 with IAS**

**Radiometric**
- L7 Cross Calibration
- Outgassing Correction
- Look-up Table (LUT)
- Coherent Noise Analysis
- L1r Day Characterization
- L1r Night Characterization
**Geometric **
- Bumper Mode Mirror Calibration
- Geodetic Accuracy Assessment
- Band to Band Alignment
- Sensor Alignment
**Spatial**
- MTF Characterization

## Internal IAS Processing

**Trending**

- RPS

- L0R
- Data

- L0R
- CPF

- GPS

**Database Query**

**Database Query**

- Trending
- Database

- RPS
- Parameters

- GPS
- Parameters

**Internal IAS Processing**

- Elev / GPS

**Notes:**
So how does IAS do its job?

The two main processes within the IAS are the Radiometric Processing System (RPS) and the Geometric Processing System (GPS).  These algorithms serve two purposes.

One, they can take L0R Scene Data and its associated CPF, and process the data into a finished product through a series of intermediate steps.

In addition, they can calibrate the data, using calibration devices on the spacecraft and control sites on the ground, to produce new calibration parameters that are stored in the Trending Database.  A database query can pull either single parameters, a parameter’s mean, or a parameter’s extrapolated trend from the Trending Database.  If the operator chooses, the IAS can use the queried parameters in RPS and GPS processing to create the finished products.  So the IAS can create many variations of products, substituting calibration parameters and parameter trends, until the optimum values are found; these optimum values are then included into the CPF.

## Upcoming IAS Releases

**IAS 7.1.3 Bumper Mode Release**
- In production 1/08/07
- BM Physical Model Gap Phased Stats Generation
**IAS 8.0 multi-mission architecture**
- Scheduled for production 5/3/07
- CPF update: Add bumper mode daily parameters
- LPGS to follow this summer
**IAS / next:  L4 TM Calibration (SDSU starting now) **
**IAS / next: MSS all Calibration (Feasibility Fall 2007) **

## Landsat 7 Calibration 

**Geodetic Accuracy **
**Band 2 Band**
**MTF Characterization**
**Radiometric Assessment**
**Thermal Band Assessment **
**PASC / FASC Analysis**
**IGS RCC / L0r Data Validation & Exchange**
**IGS L1 Data Validation & Exchange**
**IGS Mission Wide Metadata exchange**
**CPF generation / publication**
**Product Validation / Technical assistance**

## Scene Trending -- October, 2006

**LPGS ingests****	****	****IAS ingests**

- 		309	LPGS ingests
- 		351	IAS ingests

## Landsat 5 Calibration

**TM Calibration Development with SDSU and EROS**
**Bumper Mode Calibrations**
**L5 Recalibration Activity**
**Working with ESA to provide Invariant Site Calibrations over Libya**
**L5 LUT update**
**L4 and L5 TM OG icing correction improvements**
**L5 TM thermal band absolute calibration corrections**
**CPF parameters and definition document**
**Fixed Solar Array operations**

## Future Calibration Efforts

**SDSU to complete development for L5 TM**
**EROS to work on L5 TM geometry development**
**EROS to work on L7 Bumper Mode characterization**
**SDSU to begin work on L4 TM development**
**SDSU to begin MSS calibration feasibility study**
**Landsat Mission Gap potential work**
**Work with Landsat Science Team on Calibration Concerns / specific issues with data continuity**

## IGS Data Validation & Exchange

**L7 DV&E**
- Currently supporting 4 International and 3 USGS network stations
**L5 DV&E**
- Currently supporting 10 International and 3 USGS network stations, 3 mid-decadal campaign, 2 mid-decadal proposed
- New L5 stations:  Mexico (Chetumal), ESA/Malindi (Kenya), Maspalomas, Russia (Irkutsk and Moscow), ** **
**Metadata Exchange**

## Landsat 7 Network

**Landsat 7 Network**

## Landsat 5 Reception Network

**Landsat 5 Reception Network**

**Currently supporting 10 International and 3 USGS network stations, 3 mid-decadal campaign, 2 mid-decadal proposed**
**New L5 stations:  Mexico (Chetumal), ESA/Malindi (Kenya), Maspalomas, Russia (Irkutsk and Moscow), **

## Spacecraft / Sensor Anomaly Investigations

**The Calibration group is relied on for Sensor and data expertise for Anomaly resolution**
- Attitude data is effected by some anomalies
- Image data analysis
**Bumper Mode on L7**
- Ensure wecan process
- Align Scans
- Update CPF’s

## Questions?

**Questions?**

** **