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44-400: The DMC provides far larger areas of imagery than, but at comparable resolution to, established government imaging satellites such as Landsat . DMC imagery was deliberately designed to be comparable to Landsat imagery, in order to leverage the expertise and software of the large established remote sensing community used to working with Landsat images. Imagery can be provided far more rapidly from

88-634: A GPS reflectometry experiment and onboard Internet router (on the UK-DMC satellite). The DMC satellites are notable for communicating with their ground stations using the Internet Protocol for payload data transfer and command and control, so extending the Internet into space, and allowing experiments with the Interplanetary Internet to be carried out. Many of the technologies used in the design of

132-835: A continuous image sweep across a swath equivalent to 185 km on the Earth's surface. The MSS's design also emphasized precision; by precisely timing the mirror's movements, it ensured that consecutive images did not overlap. However, by the 1980s, the cost dynamics shifted. Accessing Landsat's imagery became substantially more expensive, making the French SPOT satellite's images a more cost-effective alternative for many users. The rise in Landsat's prices can be attributed to U.S. policy shifts, initiated under President Carter's leadership and finalized during President Reagan's administration. Landsat data provides information that allows scientists to predict

176-423: A land cover map of Mozambique 's mangrove forest. The main objective was to measure the mangrove cover and above ground biomass on this zone that until now could only be estimated, the cover was found with 93% accuracy to be 2909 square kilometers (27% lower than previous estimates). Additionally, the study helped confirm that geological setting has a greater influence on biomass distribution than latitude alone -

220-459: A launch no later than 2020. In April 2015, NASA and the USGS announced that work on Landsat 9 had commenced, with funding allocated for the satellite in the president's FY2016 budget, for a planned launch in 2023. Funding for the development of a low-cost thermal infrared (TIR) free-flying satellite for launch in 2019 was also proposed, to ensure data continuity by flying in formation with Landsat 8. In

264-597: A reconnaissance trip, he found great diversity of wildlife as well as three new species of butterflies and a new snake species. Following his discovery, he continued to study this forest and was able to map and determine the forest extent. Landsat 8 launched on 11 February 2013. It was launched on an Atlas V 401 from Vandenberg Air Force Base by the Launch Services Program . It will continue to obtain valuable data and imagery to be used in agriculture, education, business, science, and government. The new satellite

308-760: A substantial impact in the Western United States , the secretary of the interior has typically come from a western state; only one secretary since 1949, Rogers Morton , was not a resident or native of a state lying west of the Mississippi River . Secretary of the Interior is a Level I position in the Executive Schedule , thus earning a salary of US$ 246,400, as of January 2024. Following Senate confirmation in March 2021, former U.S. representative Deb Haaland

352-422: A time-lapse like series of images of development. Human development specifically, can be measured by the size a city grows over time. Further than just population estimates and energy consumption, Landsat imagery gives an insight of the type of urban development, and study aspects of social and political change through visible change. In Beijing for example, a series of ring roads started to develop in 1980s following

396-606: Is relatively high, yet revisit time is relatively less frequent. The Landsat program incorporated the Multispectral Scanner (MSS) from its first mission up to its fifth. The MSS gave the United States an advantage in satellite imaging, facilitating the launch of Landsat ahead of the French SPOT satellite. The MSS was unique in its design. Rather than a static camera, it employed a moving mirror, capturing Earth's images in four distinct spectral bands. This capability allowed

440-472: Is that it provides data at a synoptic global level that is impossible to replicate with in situ measurements. However, there are tradeoffs between the local detail of the measurements (radiometric resolution, number of spectral bands) and the spatial scale of the area being measured. Landsat imagery is coarse in spatial resolution compared to using other remote sensing methods, such as imagery from airplanes. Compared to other satellites, Landsat's spatial resolution

484-573: The DMC satellites, including Internet Protocol use, were tested in space beforehand on SSTL's earlier UoSAT-12 satellite . Landsat The Landsat program is the longest-running enterprise for acquisition of satellite imagery of Earth . It is a joint NASA / USGS program. On 23 July 1972, the Earth Resources Technology Satellite was launched. This was eventually renamed to Landsat 1 in 1975. The most recent, Landsat 9 ,

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528-420: The DMC than from Landsat, thanks to having multiple similar satellites in orbit ready to cross over a point of interest, and the larger images produced. This brings the responsiveness that is needed for emergencies and for disaster support, with images provided across the Internet from the responsive satellite and a member country's ground station within a day or less of a request being made. The DMC has monitored

572-477: The Earth Observation Satellite Company (EOSAT), a partnership of Hughes Aircraft Company and RCA , was selected by NOAA to operate the Landsat system with a ten-year contract. EOSAT operated Landsat 4 and Landsat 5, had exclusive rights to market Landsat data, and was to build Landsats 6 and 7. In 1989, this transition had not been fully completed when NOAA's funding for the Landsat program

616-734: The Interior is the head of the United States Department of the Interior . The secretary and the Department of the Interior are responsible for the management and conservation of most federal land along with natural resources , leading such agencies as the Bureau of Land Management , the United States Geological Survey , Bureau of Indian Affairs and the National Park Service . The secretary also serves on and appoints

660-508: The Landsat instruments are: * Original MSS pixel size was 79 x 57 meters; production systems now resample the data to 60 meters. * TM Band 6 was acquired at 120-meter resolution, but products are resampled to 30-meter pixels. * ETM+ Band 6 is acquired at 60-meter resolution, but products are resampled to 30-meter pixels. * TIRS bands are acquired at 100 meter resolution, but are resampled to 30 meter in delivered data product. An advantage of Landsat imagery, and remote sensing in general,

704-451: The MSS to record variations in sunlight reflected from the Earth. Notably, Landsat 3's MSS was further advanced, with an added capability to detect heat radiation. One of the prominent features of the MSS was its consistent imaging. Each captured frame represented an area on the Earth's surface approximately 83 meters in length and 68 meters in width. Additionally, the system was designed to ensure

748-489: The U.S. Geological Survey (USGS) "EarthExplorer" website. Landsat 7 data has eight spectral bands with spatial resolutions ranging from 15 to 60 m (49 to 197 ft); the temporal resolution is 16 days. Landsat images are usually divided into scenes for easy downloading. Each Landsat scene is about 115 miles long and 115 miles wide (or 100 nautical miles long and 100 nautical miles wide, or 185 kilometers long and 185 kilometers wide). In 1965, William T. Pecora ,

792-517: The USGS convinced the Secretary of the Interior , Stewart Udall , to announce that the Department of the Interior (DOI) was going to proceed with its own Earth-observing satellite program. This savvy political stunt coerced NASA to expedite the building of Landsat. But budgetary constraints and sensor disagreements between application agencies (notably the Department of Agriculture and DOI) again stymied

836-699: The data. Landsat 1 through 5 carried the Landsat Multispectral Scanner (MSS). Landsat 4 and 5 carried both the MSS and Thematic Mapper (TM) instruments. Landsat 7 uses the Enhanced Thematic Mapper Plus (ETM+) scanner. Landsat 8 uses two instruments, the Operational Land Imager (OLI) for optical bands and the Thermal Infrared Sensor (TIRS) for thermal bands. The band designations, bandpasses, and pixel sizes for

880-419: The distribution of species, as well as detecting both naturally occurring and human-generated changes over a greater scale than traditional data from field work. The different spectral bands used on satellites in the Landsat program provide many applications, ranging from ecology to geopolitical matters. Land cover determination is a common use of Landsat imagery around the world. Landsat imagery provides one of

924-481: The economic reform of 1970, and the change in development rate and construction rate was accelerated in these time periods. In 2005, Landsat imagery assisted in the discovery of new species. Conservation scientist Julian Bayliss wanted to find areas that could potentially become conservation forests using Landsat generated satellite images. Bayliss saw a patch in Mozambique that until then had no detailed information. On

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968-637: The effects and aftermath of the Indian Ocean Tsunami (December 2004), Hurricane Katrina (August 2005), and many other floods, fires and disasters. The Sun-synchronous orbits of these satellites are coordinated so that the satellites follow each other around an orbital plane, ascending north over the Equator at 10:15 am local time (and 10:30 am local time for Beijing-1). Some of these satellites also include other imaging payloads and experimental payloads: onboard hardware-based image compression (on BilSAT),

1012-407: The fact that is the longest-running satellite program gives it a unique perspective to generate information of Earth. Glacier retreat in a big scale can be traced back to previous Landsat missions, and this information can be used to generate climate change knowledge. The Columbia glacier retreat for example, can be observed in false-composite images since Landsat 4 in 1986. Landsat imagery gives

1056-541: The future, there may also be more collaboration between Landsat satellites and other satellites with similar spatial and spectral resolution, such as the ESA 's Sentinel-2 constellation. Landsat Next is planned to launch in late 2030/early 2031 and will measure 26 spectral bands; current Landsat's 8 and 9 measure 11 each. United States Secretary of the Interior The United States Secretary of

1100-437: The importance of Landsat imagery and satellite images in general. The Yellowstone fires of 1988 were the worst in the recorded history of the national park. They lasted from 14 June to 11 September 1988, when rain and snow helped halt the spread of the fires. The area affected by the fire was estimated to be 3,213 square kilometers – 36% of the park. Landsat imagery was used for the area estimation, and it also helped determine

1144-660: The longest uninterrupted time series available from any single remote sensing program, spanning from 1972 to present. Looking to the future, the successful launch of Landsat-9 in 2021 shows that this time series will be continued forward. In 2015, the Landsat Advisory Group of the National Geospatial Advisory Committee reported that the top 16 applications of Landsat imagery produced savings of approximately 350 million to over 436 million dollars each year for federal and state governments, NGO's, and

1188-496: The mangrove area is spread across 16° of latitude but it the biomass volume of it was affected more strongly by geographic conditions. The shrinking of the Aral Sea has been described as "One of the planet's worst environmental disasters". Landsat imagery has been used as a record to quantify the amount of water loss and the changes to the shoreline. Satellite visual images have a greater impact on people than just words, and this shows

1232-494: The name was changed to Landsat. In 1979, President of the United States Jimmy Carter 's Presidential Directive 54 transferred Landsat operations from NASA to National Oceanic and Atmospheric Administration (NOAA), recommended development of a long term operational system with four additional satellites beyond Landsat 3, and recommended transition to private sector operation of Landsat. This occurred in 1985 when

1276-576: The new satellite-generated imagery was to find high yield fishery areas. Through the Landsat Menhaden and Thread Investigation, some satellite data of the eastern portion of the Mississippi sound and another area off the coast of the Louisiana coast data was run through classification algorithms to rate the areas as high and low probability fishing zones, these algorithms yielded a classification that

1320-541: The private citizens on the National Park Foundation Board. The secretary is a member of the United States Cabinet and reports to the president of the United States . The function of the U.S. Department of the Interior is different from that of the interior minister designated in many other countries. As the policies and activities of the Department of the Interior and many of its agencies have

1364-509: The private sector. That estimate did not include further savings from other uses beyond the top sixteen categories. The top 16 categories for Landsat imagery use, listed in order of estimated annual savings for users, are: Further uses of Landsat imagery include, but are not limited to: fisheries, forestry, shrinking inland water bodies, fire damage, glacier retreat, urban development, and discovery of new species. A few specific examples are explained below. In 1975, one potential application for

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1408-468: The reasons why the fire spread so quickly. Historic drought and a significant number of lightning strikes were some of the factors that created conditions for the massive fire, but anthropogenic actions amplified the disaster. On images generated previous to the fire, there is an evident difference between lands that display preservation practices and the lands that display clear cut activities for timber production. These two type of lands reacted differently to

1452-431: The satellite construction process. Finally, by 1970 NASA had a green light to build a satellite. Remarkably, within only two years, Landsat 1 was launched, heralding a new age of remote sensing of land from space. The Hughes Aircraft Company from Santa Barbara Research Center initiated, designed, and fabricated the first three Multispectral Scanners (MSS) in 1969. The first MSS prototype, designed by Virginia Norwood ,

1496-461: The stress of fires, and it is believed that that was an important factor on the behavior of the wildfire. Landsat imagery, and satellite imagery in general, have contributed to understanding fire science; fire danger, wildfire behavior and the effects of wildfire on certain areas. It has helped understanding of how different features and vegetation fuel fires, change temperature, and affect the spreading speed. The serial nature of Landsat missions and

1540-524: The then director of the United States Geological Survey , proposed the idea of a remote sensing satellite program to gather facts about the natural resources of our planet. Pecora stated that the program was "conceived in 1966 largely as a direct result of the demonstrated utility of the Mercury and Gemini orbital photography to Earth resource studies." While weather satellites had been monitoring Earth's atmosphere since 1960 and were largely considered useful, there

1584-432: The year's funding to NOAA, requesting that agencies that used Landsat data provide the funding for the other six months of the upcoming year. In 1992, various efforts were made to procure funding for follow on Landsats and continued operations, but by the end of the year EOSAT ceased processing Landsat data. Landsat 6 was finally launched on 5 October 1993, but was lost in a launch failure. Processing of Landsat 4 and 5 data

1628-523: Was assembled in Arizona by Orbital Sciences Corporation . Landsat 9 launched on September 27, 2021. During FY2014 financial planning "appropriators chided NASA for unrealistic expectations that a Landsat 9 would cost US$ 1 billion, and capped spending at US$ 650 million" according to a report by the Congressional Research Service . United States Senate appropriators advised NASA to plan for

1672-527: Was completed within nine months, in the fall of 1970. It was tested by scanning Half Dome at Yosemite National Park . For this design work Norwood was called "The Mother of Landsat". Working at NASA's Goddard Space Flight Center, Valerie L. Thomas managed the development of early Landsat image processing software systems and became the resident expert on the Computer Compatible Tapes, or CCTs, that were used to store early Landsat imagery. Thomas

1716-469: Was due to run out (NOAA had not requested any funding, and U.S. Congress had appropriated only six months of funding for the fiscal year) and NOAA directed that Landsat 4 and Landsat 5 be shut down. The head of the newly formed National Space Council , Vice President Dan Quayle , noted the situation and arranged emergency funding that allowed the program to continue with the data archives intact. Again in 1990 and 1991, Congress provided only half of

1760-464: Was launched on 27 September 2021. The instruments on the Landsat satellites have acquired millions of images. The images, archived in the United States and at Landsat receiving stations around the world, are a unique resource for global change research and applications in agriculture , cartography , geology , forestry , regional planning , surveillance and education , and can be viewed through

1804-688: Was no appreciation of terrain data from space until the mid-1960s. So, when Landsat 1 was proposed, it met with intense opposition from the Bureau of Budget and those who argued high-altitude aircraft would be the fiscally responsible choice for Earth remote sensing. Concurrently, the Department of Defense feared that a civilian program such as Landsat would compromise the secrecy of their reconnaissance missions. Additionally, there were geopolitical concerns about photographing foreign countries without permission. In 1965, NASA began methodical investigations of Earth remote sensing using instruments mounted on planes. In 1966,

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1848-488: Was one of the image processing specialists who facilitated the ambitious 'Large Area Crop Inventory Experiment', known as LACIE — a project that showed for the first time that global crop monitoring could be done through remote sensing with Landsat satellite imagery. The program was initially called the Earth Resources Technology Satellites Program, which was used from 1966 to 1975. In 1975,

1892-498: Was proven with in situ measurements – to be over 80% accurate and found that water color, as seen from space, and turbidity significantly correlate with the distribution of menhaden – while surface temperature and salinity do not appear to be significant factors. Water color – measured with the multispectral scanners four spectral bands, was used to infer Chlorophyll , turbidity , and possibly fish distribution. An ecological study used 16 ortho-rectified Landsat images to generate

1936-529: Was resumed by EOSAT in 1994. NASA finally launched Landsat 7 on 15 April 1999. The value of the Landsat program was recognized by Congress in October 1992 when it passed the Land Remote Sensing Policy Act (Public Law 102-555) authorizing the procurement of Landsat 7 and assuring the continued availability of Landsat digital data and images, at the lowest possible cost, to traditional and new users of

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