# Presentation: 850099

## Landsat Data Continuity MissionPre-Solicitation ConferenceData Specification

- LDCM Study Scientist

**Landsat Data Continuity Mission****Pre-Solicitation Conference****Data Specification**

## Data Spec and the Formulation Phase RFP

- The LDCM Data Specification to be released with the Formulation Phase RFP will be the 4th version
- The first version was posted in Nov., ‘00 and reviewed at the First LDCM Workshop in Jan., ‘01
- The second version was posted in April, ‘01 and reviewed at the Second LDCM Workshop in April, ‘01
- The third version was released with the Draft RFP in August, ‘01

## Sec. 2  LDCM Data and Data Products 

- Specifies archival of unprocessed LDCM data
- Specifies production of unenhanced LDCM data products
- Level 0 - unprocessed LDCM digital image data
- Level 1 -  preprocessed LDCM digital image data
- Changes:
- Clarified that specifications applied for life of the LDCM
- Deleted specification that prohibited pixel resampling or averaging to create Level 1R product
- Specified Level 1 image grid orientation options
- North up
- WRS-2 path

## Data Granule

- The term granule is a generic description for a digital image that can be inventoried or ordered. A granule will typically have attributes associated with it, e.g., id, size (MB), Date, Time, etc.

## Sec. 3 Spatial Coverage and Temporal Resolution

- Specifies average daily archival of at least 250 WRS-2 scenes per day
- Specifies an archive-driven data acquisition strategy affording global coverage of the Earth’s land surfaces on a seasonal basis
- Specifies coverage of the 50 United States at least once every 16 days
- Changes:
- Deleted reference to International Cooperators

## Sec. 4 Spectral Bands

- Specifies heritage spectral coverage minus thermal band
- Band edges refined to avoid atmospheric absorption features
- Changes:
- Clarified option for using a red spectral band for the panchromatic band

## Sec. 5 Spatial Resolution

- Specifies heritage ground sampling distances
- 15 m panchromatic band
- 30 m reflective bands
- Specifies edge response and aliasing for Level 1R digital image data
- Changes
- Clarified that edge response and aliasing specifications applied to Level 1R digital image data

## Sec. 6 Radiometry

- Specifies an uncertainty of less-than-or-equal-to 5% for at-aperture spectral radiance for Level 1 digital image data
- Specifies signal-to-noise ratios and dynamic range
- Specifies pixel-to-pixel radiometric uniformity in Level 1 data
- Changes
- Relaxed pixel-to-pixel uniformity specification for panchromatic band
- Clarified definition of coherent noise

## Sec. 7 Image Geometry, Geolocation, and Cartographic Registration

- Specifies spectral band-to-spectral band registration accuracy
- Specifies image-to-image registration accuracy
- Specifies geodetic accuracies for Level 1G data products

## Sec. 8 Thermal Band Option

- Specifies two thermal bands for a design and cost option study
- Changes:
- Changed ground sampling distance requirement from 60 m to 120 m
- Changed dynamic range to bring minimum above 0 Kelvin

## Sec. 9 Reflective Band Options

- Specifies two reflective  spectral bands for  design and cost option studies
- A band center at 443 nm (30 m GSD) for coastal zone studies
- A band center at 1375 nm (120 m GSD) for cirrus cloud detection and correction

## Technical and Cost Drivers

- The Formulation Phase Statement-of-Work requires the formulation phase contractor(s) to identify any technical cost-drivers in the LDCM requirements and recommend refinements, modifications and technical options that would make the implementation of LDCM more cost effective