landsat 8 oli (operational land imager)
TRANSCRIPT
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/