Identification_Information: Citation: Citation_Information: Originator: Paul R. Blackwell, Columbia Regional Geospatial Service Center, Stephen F. Austin State University Publication_Date: <> (day: <>) Publication_Time: <> CDT Title: a1.12104.AV_TX.214.250m Geospatial_Data_Presentation_Form: remote-sensing image Other_Citation_Details: <> Online_Linkage: http://data.crgsc.org/rs/modis/texas/2012_04_13_104/a1.12104.AV_TX.214.250m.tif Description: Abstract: Satellite images provide a unique, dramatic perspective of our Earth and its atmosphere. This image was generated through the TexasView Program at the Columbia Regional Geospatial Service Center at Stephen F. Austin State University using data gathered from an advanced sensor that flies aboard the satellites in NASA's Earth Observing System, Terra (1999) and Aqua (2002) and processed by the Cooperative Institute for Meteorological Satellite Studies (CIMSS) at the University of Wisconsin-Madison. Traveling north to south, Terra loops over the equator in the morning. Aqua moves in the opposite direction, passing south to north over the equator in the afternoon. Both satellites are in a 705km near polar, 89min, sun-synchronous orbit and carry the Moderate Resolution Imaging Spectroradiometer (MODIS). Together, the Terra MODIS and Aqua MODIS provide a complete view of the Earth every one or two days by receiving and recording a wide spectrum of electromagnetic energy. During a given day, both Terra and Aqua will make two to four passes each over the continental USA during daylight hours, and another two to four during the night. These Wisconsin images are part of the "MODIS for AmericaView" project and represent the latest images available from either Terra or Aqua. You will occasionally notice distinct boundaries in the composite because the images that comprise the composite originate from different passes. By combining the images acquired from the blue, red and green portions of the energy spectrum, SSEC generates a "true" or "natural" representation of the Earth's land, ocean, and atmosphere (Bands 1,4,3). Other combinations using infrared portions of the energy spectrum result in "false color" images that make it easier to differentiate surface features such as ice and snow from clouds and land from water (Bands 7,2,1). A near-infrared image (Bands 2,1,4) emphasizes chloraphyll production in red. The MODIS instruments are able to capture images at a maximum resolution of 250 meters per pixel at the Earth's surface. This website features MODIS images at 4000 meter resolution over Wisconsin as well as 2000-, 1000-, and 250-meter resolution images for three different band-combination products. Several processing steps are needed to create the images from the raw data collected by the MODIS instrument. First, the raw digital counts acquired by MODIS are calibrated to physical units known as reflectance. Next, the images are processed to remove some (but not all) of the image features introduced by the atmosphere, such as haze. Then the images are transformed from the projection geometry of the instrument (which includes distortions due to phenomena such as earth curvature) into a standard map projection, known as the equirectangular projection. Finally, the images are enhanced using contrast adjustment and image sharpening techniques. As new images become available from Terra and Aqua throughout the day, they automatically appear on the website. The images are usually available within 60 minutes of the time they are acquired onboard the spacecraft. Purpose: The purpose of this website is to provide the public with daily satellite imagery of Texas in an easy-to-use interface. These images are processed at the Space Science & Engineering Center, University of Wisconsin-Madison and at the Columbia Regional Geospatial Service Center, Stephen F. Austin State University, Nacogdoches, TX and can be viewed directly in any web browser or graphics program as well as GIS software (using the downloadable GeoTIFF (.tif) file or .zip Geo-enabled JPEG bundle). Supplemental_Information: These daily MODIS GeoTIFF and JPEG images are a simplified, derived form of imagery from the full science data in HDF format. This image represents MODIS spectral band numbers 143 as red, green, and blue. If you are looking for full Level 1B science data please visit: http://www.ssec.wisc.edu/~gumley/modis_gallery/ for more information. Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: <> Time_of_Day: <> CDT Currentness_Reference: publication date Status: Progress: Complete Maintenance_and_Update_Frequency: None planned Spatial_Domain: Bounding_Coordinates: West_Bounding_Coordinate: -106.7500000000000 East_Bounding_Coordinate: -93.2500000000000 North_Bounding_Coordinate: 36.750000000000 South_Bounding_Coordinate: 25.749000000000 Keywords: Theme: Theme_Keyword_Thesaurus: None Theme_Keyword: Satellite Imagery Theme_Keyword: MODIS Theme_Keyword: Near Real-time Theme_Keyword: University of Wisconsin-Madison Theme_Keyword: SSEC Theme_Keyword: CIMSS Theme_Keyword: Direct Broadcast Theme_Keyword: Direct Reception Theme_Keyword: Direct Readout Theme_Keyword: WisconsinView Theme_Keyword: AmericaView Theme_Keyword: TexasView Theme_Keyword: CRGSC Theme_Keyword: SFASU Place: Place_Keyword_Thesaurus: None Place_Keyword: United States Place_Keyword: Texas Place_Keyword: Lower 48 Place_Keyword: Coterminous Place_Keyword: United States of America Place_Keyword: USA Place_Keyword: US Access_Constraints: None. Use_Constraints: For non-commercial use. Attribute credit to: TexasView, Space Science and Engineering Center, University of Wisconsin-Madison Point_of_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: Cooperative Institute for Meteorological Satellite Studies, Space Science & Engineering Center, University of Wisconsin-Madison Contact_Person: Liam Gumley or Sam Batzli Contact_Address: Address_Type: mailing address Address: 1225 W Dayton St Address: University of Wisconsin-Madison City: Madison State_or_Province: WI Postal_Code: 53706 Country: USA Contact_Voice_Telephone: 608-263-7435 Contact_Facsimile_Telephone: 608-262-5974 Contact_Electronic_Mail_Address: cimssmaster@ssec.wisc.edu Data_Set_Credit: Liam Gumley and Sam Batzli, Space Science and Engineering Center, University of Wisconsin-Madison Native_Data_Set_Environment: Linux Data_Quality_Information: Lineage: Process_Step: Spatial_Data_Organization_Information: Direct_Spatial_Reference_Method: Raster Raster_Object_Information: Raster_Object_Type: Pixel Row_Count: 2493 Column_Count: 2830 Vertical_Count: 1 Spatial_Reference_Information: Horizontal_Coordinate_System_Definition: Geographic: Latitude_Resolution: 0.000000 Longitude_Resolution: 0.000000 Geographic_Coordinate_Units: Decimal degrees Planar: Planar_Coordinate_Information: Planar_Coordinate_Encoding_Method: row and column Coordinate_Representation: Abscissa_Resolution: 0.0030000001 Ordinate_Resolution: 0.0030000001 Geodetic_Model: Horizontal_Datum_Name: D_WGS_1984 Ellipsoid_Name: WGS_1984 Semi-major_Axis: 6378137.000000 Denominator_of_Flattening_Ratio: 298.257224 Distribution_Information: Resource_Description: Downloadable Data Standard_Order_Process: Digital_Form: Digital_Transfer_Option: Online_Option: Computer_Contact_Information: Network_Address: Network_Resource_Name: http://www.wisconsinview.org/imagery/modis.php Access_Instructions: (see website for instructions) Online_Computer_and_Operating_System: (Linux) Fees: None Ordering_Instructions: Visit http://www.wisconsinview.org/imagery/modis.php Turnaround: Online download. Available_Time_Period: Time_Period_Information: Range_of_Dates/Times: Beginning_Date: 20000101 Ending_Date: on going Metadata_Reference_Information: Metadata_Date: 20090331 Metadata_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: PR Blackwell Contact_Organization: Columbia Regional Geospatial Service Center, Stephen F. Austin State University Contact_Address: Address_Type: mailing address Address: PO Box 13074 Address: Stephen F. Austin State University City: Nacogdoches State_or_Province:TX Postal_Code: 75965 Country: USA Contact_Voice_Telephone: 936-468-6100 Contact_Facsimile_Telephone: 936-568-0701 Contact_Electronic_Mail_Address: prb@crgsc.org Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata Metadata_Standard_Version: FGDC-STD-001-1998 Metadata_Time_Convention: local time Metadata_Access_Constraints: None. Metadata_Use_Constraints: None. 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