Landsat 8 OLI (Operational Land Imager)

LANDSAT - 8 OLI

Presented By Muhammad Haris

Overview Background Introduction Sensors:

Operational Land Imager (OLI) Thermal Infrared Sensors (TIRS) Resolutions :

Spatial ResolutionSpectral Resolution Temporal Resolution Radiometric Resolution

Comparison Sample Images

Background First Surveying Satellite (Landsat) The first Landsat satellite was called the Earth

Resources Technology Satellite, or ERTS. Since its launch on July 23, 1972, seven Landsats have followed, with the latest, Landsat 8, lifting off on February 11, 2013. Over the years successive Landsats have not only carried better land-viewing sensors, but they have created a valuable archive of images that are being used to see how the land is changing over the years. Landsat 8 carries Operational Land Imager (OPI) and Thermal Infrared Sensor (TIRS) , which scans the Earth in Eleven bands of visible and invisible light

Introduction

• Spacecraft: Landsat 8• Carrier rocket: Atlas -V Rocket• Launch date: 11th February 2013• Launch site: Vandenberg Air Force

Base California • Orbit: Sun-synchronous orbit at an

altitude of 705 km (438 mi)• Equatorial crossing time: 10:00 a.m.

+/- 15 minutes

Introduction Continue The Landsat program offers the longest

continuous global record of the Earth’s surface

Joint operation between NASA and USGS Landsat 8 officially began normal operations

on May 30, 2013 Landsat 8 has collected about 400 scenes of

the Earth’s surface per day. Global coverage in 8 bands Swath width of Landsat 8 is 185km

(115Miles)

Sensors

The Landsat 8 satellite payload consists of two specific sensors;

Operational Land Imager (OLI) Thermal Infrared Sensor (TIRS)

Operational Land Imager (OLI)

OLI will collect images using nine spectral bands in different wavelengths of visible, near-infrared, and shortwave light to observe a 185 kilometer (115 mile) wide swath of the Earth in 15-30 meter resolution covering wide areas of the Earth's landscape while providing sufficient resolution to distinguish features like urban centers, farms, forests and other land uses.

Thermal Infrared Sensor (TIRS) The Thermal Infrared Sensor (TIRS)

contains two thermal bands (10 and 11), which measure land surface temperature at 100-meter resolution. (The product provided is resampled and delivered as a 30-meter image). In the TIRS thermal bands, dark pixels represent cool temperatures; light pixels represent hot temperatures. Thermal band data provide important information about water irrigation use in arid land, as well as heat units in urban areas.

Resolutions

Spatial Resolution Spectral Resolution Temporal Resolution

Radiometric Resolution

Spatial Resolution 9 spectral = 30 meters for Bands 1 to 7

and 9. Band 8 (panchromatic) = 15 meters. Thermal bands 10 , 11 = 100 meters New band 1 (ultra-blue) is useful for coastal

and aerosol studies. New band 9 is useful for cirrus cloud

detection. 10 and 11 are useful in providing more

accurate surface temperatures

Spectral ResolutionBand Band Name Spectral

range (nm)

Use Of Data Resolution

1 New Deep Blue

433-453 Aerosol/ Coastal zone

30m

2 Blue 450-515 Pigments/scatter/Coastal

30m

(TM heritage Bands)

3 Green 525-600 Pigments/Coastal4 Red 630-680 Pigments/Coastal5 NIR 845-885 Foliage/Coastal6 SWIR2 1560-

1660Foliage

7 SWIR3 2100-2300

Minerals/Litter/no scatter

8 PAN 500-680 Image sharpening 15 m9 SWIR 1360-

1390Cirrus Cloud Detection

30 m

10 TIRS1 10060-11190

Surface Temperature 100*(30)

11 TIRS2 11500-12510

100*(30)

Temporal Resolution

The entire Earth will fall within view once every 16 days. I does Mean that Temporal Resolution of Landsat 8 is 16 days. It complete its ! Successive round in 16 days

Radiometric Resolution

Radiometric resolution of Landsat 8 is 16 Bits.

Landsat 8 Enhancement

Landsat 8 images normally looks hazy before processing.

Please have a look of Landsat 8 images of Inle Lake before and after processing.

Comparison with Landsat 7The spectral bands (1 - 9) of the OLI sensor, while similar to Landsat 7’s ETM+ sensor, provide enhancement from prior Landsat instruments, with the addition of two new spectral bands: a deep blue visible channel (band 1) specifically designed for water resources and coastal zone investigation, and a new infrared channel (band 9) for the detection of cirrus clouds. A new Quality Assurance band is also included with each data product. This provides information on the presence of features such as clouds, water, and snow.

Comparison Continue

Image of Landsat 7 ETM+

Image of Landsat 8 OLI

Sample Images1. Natural Hazard Recovery

Before After

2.With Landsat 8's improved ability to detect variations in colors, the waters of Lake Ontario can show sediment patterns as well as potentially problematic algae, indicated by higher chlorophyll

concentrations.

3. his Landsat 8 satellite image of some southern Japanese islands includes Tanegashima (far right), from where the Global Precipitation Measurement, or GPM, mission's Core Observatory is scheduled to blast into orbit aboard a Japanese H-IIA rocket. This image was taken on April 13, 2013

4. Forest Cover Loss

5.Random Regions captured from landsat 8.

Thank You

References

http://www.nasa.gov/content/goddard/landsat-eyes-japan-gpm-launch-site/#.VHHRCjTF_Xk

http://landsat.usgs.gov/about_ldcm.php

http://www.satimagingcorp.com/satellite-sensors/other-satellite-sensors/landsat-8/