EO-1-Overview of company/Ali

From: http://blog.sina.com.cn/s/blog_5ebcc024010123m9.html

 

I. background

NMP (NASA New Millennium Plan): it aims to test a series of new 21 Century satellite technologies, known as flight verification, by launching experimental satellites. It is currently included in the plan: EO, DS, and St ). The EO-1 is the first satellite to be planned for the earth, And the EO-2 (infrared laser radar on the aerospace aircraft) and the EO-3 (New Technologies of the static meteorological satellite are verified, in order to significantly improve the timeliness and accuracy of current weather forecasts ).

Earth observation satellite-1 (EO-1) is the first Earth observation satellite of NASA's New Millennium Plan (nmp). It is also a new earth observation satellite developed to replace landsat7 in the 21st century, the purpose is to verify the satellite ontology and the new remote sensor technology. The satellite was successfully launched in November 21, 2000.

The EO-1 is equipped with 3 sensors:

1. High-spectrum imaging spectrometer epoch

2. Advanced Land imager Ali (Advanced Land imager)

3. Atmospheric Corrector)

II. Introduction to Sensors

(1) Hyperion Hyperspectral Imaging Spectrometer

1. Introduction to Hyperion

The data published on this website covers 15 °-55 ° north latitude and 70 °-140 ° east longitude. There are two data formats:

Level 1R data product (Hyp-L1R)

Level 1gst data product (Hyp-L1G)

As the first satellite-mounted hyperspectral measuring instrument, the Hyperion sensor is the only on-orbit satellite hyperspectral imaging spectrometer and the only publicly available hyperspectral measuring instrument. It is of great significance.

Band: a total of 242 bands with a spectral range of 400 ~ 2500nm, the spectral resolution reaches 10 nm.

Ground Resolution: 30 m

Width: 7.7 km

Data level: l1r & l1gst

2. Product Parameters

Graph projection:	UTM (UTM area defined by the longitude and latitude of the image Center)
Coordinate System:	WGS84
Spectral Range:	0.4-2.5 micron
Full color band:	0
Visible band:	35
Near Infrared:	35
Short-wave infrared:	172
Mid-infrared band:	0
Thermal Infrared:	0
Scan width:	7.5 km
Time Resolution:	200 days
Pixel size:	30 meters
Data format:	HDF & tiff

3. Data Organization

Hosts file.

4. Naming rules

Eo1sppprrryyyydddxxxml

Eo1: Satellite

S: Sensor (A: Ali sensor, H: Hyperion sensor)

PPP: WRS path

Rrr: WRS row

Yyyy: Year of Image Acquisition

DDD: image acquisition date

X: the State of the Hyperion sensor (0 = OFF, 1 = on)

X: Ali sensor STATUS (0 = OFF, 1 = on)

X: AC sensor STATUS (0 = OFF, 1 = on)

M: mode (N: Nadir, P: pointed within path/row, K: pointed
Outside path/row)

L: Image length (F: panorama, P: Partial scene, Q: Second
Partial scene, S: swatch, and some other letters may be used to keep IDs different)

(2) Ali Advanced Land imager

1. Introduction to Ali

It can be considered as an alternative data of NASA for Landsat TM and ez. It's technical performance and indicators and Landsat
The 7-step image processing language.

Band: 10 bands in total, covering visible light, near-infrared, short-wave infrared and thermal infrared. Both the wavelength range and spatial resolution are identical to that.

Ground Resolution: The color band is 10 m, and the other band is 30 m.

Width: 37 km

Ali data of this website is Level 1 GST-level data products, that is, data products that have undergone topographic correction, covering the range of 15 °-55 ° north latitude, the area of the rectangle between 70 ° and 140 °.

2. Product Parameters

Map Projection:	UTM (UTM area defined by the longitude and latitude of the image Center)
Coordinate System:	WGS84
Spectral Range:	0.4-2.4 micron
Full color band:	1
Visible band:	Six
Near Infrared:	2
Short-wave infrared:	1
Mid-infrared band:	1
Thermal Infrared:	0
Scan width:	37 km
Sampling Method:	CC (cubic convolution)
Time Resolution:	16 days
Pixel size:	30 meters, full color band 10 meters
Data format:	Geotiff

3. Data Organization

Hosts file;

(1) TIF. A total of 10 TIFF files correspond to band1 to band10, for example:

Eo1a1200322007159110pv_b01_l1t.tif

Eo1a1200322007159110pv_b02_l1t.tif

Eo1a1200322007159110pv_b03_l1t.tif

Eo1a1200322007159110pv_b04_l1t.tif

Eo1a1200322007159110pv_b05_l1t.tif

Eo1a1200322007159110pv_b06_l1t.tif

Eo1a1200322007159110pv_b07_l1t.tif

Eo1a1200322007159110pv_b08_l1t.tif

Eo1a1200322007159110pv_b09_l1t.tif

Eo1a1200322007159110pv_b10_l1t.tif

(2) MlT. tif, the mlt metadata file, contains the main metadata information of the data, such:

Eo1a1200322007159110pv_mtl_l1t.tif

(3). fgdc, that is, the fgdc standard metadata file, such:

Eo1a1200322007159110pv_pf2_01.fgdc

(4)readme.txt, which is the description file. It mainly contains the data format description, data naming rules, and other information.

4. Naming rules

Eo1sppprrryyyydddxxxml

Eo1: Satellite

S: Sensor (A: Ali sensor, H: Hyperion sensor)

PPP: WRS path

Rrr: WRS row

Yyyy: Year of Image Acquisition

DDD: image acquisition date

X: the State of the Hyperion sensor (0 = OFF, 1 = on)

X: Ali sensor STATUS (0 = OFF, 1 = on)

X: AC sensor STATUS (0 = OFF, 1 = on)

M: mode (N: Nadir, P: pointed within path/row, K: pointed
Outside path/row)

L: Image length (F: panorama, P: Partial scene, Q: Second
Partial scene, S: swatch, and some other letters may be used to keep IDs different)