Landsat 8 satellite was successfully launched

 

In February 11, 2013, NASA successfully launched the Landsat 8 satellite, re-injecting fresh blood into the Landsat program, which has taken over the past 40 years. Landsat-8 carries two major loads: Oli and TIRS. Among them, Oli (full name: operational land imager, land imager) was developed by Bauer Aerospace Technology Corporation in karaddo; TIRS (full name: thermal infrared sensor, thermal infrared sensor ), developed by NASA's godad Space Flight Center.

Figure: Oli land imager Structure

The Oli land imager consists of nine bands with a spatial resolution of 30 meters, including a 15-meter full color band with an imaging width of 185X185 km.

Oli includes all the bands of the mobile phone number + sensor. To avoid atmospheric absorption, Oli re-adjusts the band. The larger adjustment is Oli band5 (0.845-0.885 μm ), the water vapor absorption characteristics at 0.825 μm are excluded; The Oli full color band band8 band has a narrow range. This method can better distinguish between vegetation and vegetation-less features in the full color image;

In addition, there are two new bands: Band 1 (Band 1; 0.433-0.453 μm), which are mainly used for coastal observation and short-wave infrared band (band 9; 1.360-1.390 μm) strong water vapor absorption features can be used for cloud detection; Near Infrared band5 and short-wave infrared band9 are close to the band corresponding to the modem.

Table 1: Oli land imager Oli

Oli land imagers			*
Serial number	Band (μm)	Spatial Resolution (m)	Serial number	Band (μm)	Spatial Resolution (m)
1	0.433-0.453	30
2	0.450-0.515	30	1	0.450-0.515	30
3	0.525-0.600	30	2	0.525-0.605	30
4	0.630-0.680	30	3	0.630-0.690	30
5	0.845-0.885	30	4	0.775-0.900	30
6	1.560-1.660	30	5	1.550-1.750	30
7	2.100-2.300	30	7	2.090-2.350	30
8	0.500-0.680	15	8	0.520-0.900	15
9	1.360-1.390	30

 

The TIRS owner says the TIRS load carried on the LandSat-8 will be the most advanced ever and the best performing TIRS. TIRS will collect heat loss from the Earth's two thermal zones, with the goal of understanding water consumption in the observed zones, especially in the western United States.

Table 2: TIRS load parameters

Band #	Center wavelength (μm)	Minimum band boundary (μm)	Maximum band boundary (μm)	Spatial Resolution (m)
10	10.9	10.6	11.2	100
11	12.0	11.5	12.5	100

According to NASA's plan, Landsat 8 had to go through a 100-day adjustment period before returning the observation results to the ground.

References: http://www.sciencedirect.com/science/article/pii/S0034425712000363