前往小程序,Get更优阅读体验!
立即前往
首页
学习
活动
专区
工具
TVP
发布
社区首页 >专栏 >Google Earth Engine——NOAA气候数据记录(CDR)的AVHRR表面反射率包含网格化的每日表面反射率和亮度温度,来自NOAA七颗极地轨道卫星上的高级甚高分辨率辐射计(AVHRR)

Google Earth Engine——NOAA气候数据记录(CDR)的AVHRR表面反射率包含网格化的每日表面反射率和亮度温度,来自NOAA七颗极地轨道卫星上的高级甚高分辨率辐射计(AVHRR)

作者头像
此星光明
发布2024-02-02 09:55:32
1270
发布2024-02-02 09:55:32
举报

The NOAA Climate Data Record (CDR) of AVHRR Surface Reflectance contains gridded daily surface reflectance and brightness temperatures derived from the Advanced Very High Resolution Radiometer (AVHRR) sensors onboard seven NOAA polar orbiting satellites. The data are gridded at a resolution of 0.05° and computed globally over land surfaces.

Known issues with this dataset include:

  • TIMEOFDAY variable contains values that are too large by 1 day
  • Latitude values are not correctly associated with the center of the grid cell, error is < 0.002 degrees
  • Longitude values are not correctly associated with the center of the grid cell, error is < 0.02 degrees

See technical note from the data provider.

NOAA气候数据记录(CDR)的AVHRR表面反射率包含网格化的每日表面反射率和亮度温度,来自NOAA七颗极地轨道卫星上的高级甚高分辨率辐射计(AVHRR)传感器。这些数据以0.05°的分辨率进行网格化处理,在全球范围内对陆地表面进行计算。

这个数据集的已知问题包括。

TIMEOFDAY变量包含的数值大了1天。

纬度值与网格单元中心的关联不正确,误差<0.002度

经度值与网格单元的中心没有正确关联,误差<0.02度

见数据提供者的技术说明。

Dataset Availability

1981-06-24T00:00:00 - 2019-05-16T00:00:00

Dataset Provider

NOAA

Collection Snippet

ee.ImageCollection("NOAA/CDR/AVHRR/SR/V4")

Resolution

5566 meters

Bands Table

Name

Description

Min*

Max*

Units

Wavelength

Scale

SREFL_CH1

Bidirectional surface reflectance

1

10000

640nm

0.0001

SREFL_CH2

Bidirectional surface reflectance

1

10000

860nm

0.0001

SREFL_CH3

Bidirectional surface reflectance

-32768

32767

3.75μm

0.0001

BT_CH3

Brightness temperature

-32519

30136

K

3.75μm

0.1

BT_CH4

Brightness temperature

-32519

31450

K

11.0μm

0.1

BT_CH5

Brightness temperature

-7623

18788

K

12.0μm

0.1

TIMEOFDAY

Hours since start of day

0

2399

hours

0.01

RELAZ

Relative sensor azimuth angle

-32768

32767

Degrees

0.01

SZEN

Solar zenith angle

219

8546

Degrees

0.01

VZEN

View zenith angle, scale 0.01

0

6936

Degrees

0.01

QA

Quality control bit flags

0

QA Bitmask

Bit 0: Unused 0: No1: YesBit 1: Pixel is cloudy 0: No1: YesBit 2: Pixel contains cloud shadow 0: No1: YesBit 3: Pixel is over water 0: No1: YesBit 4: Pixel is over sunglint 0: No1: YesBit 5: Pixel is over dense dark vegetation 0: No1: YesBit 6: Pixel is at night (high solar zenith) 0: No1: YesBit 7: Channels 1-5 are valid 0: No1: YesBit 8: Channel 1 value is invalid 0: No1: YesBit 9: Channel 2 value is invalid 0: No1: YesBit 10: Channel 3 value is invalid 0: No1: YesBit 11: Channel 4 value is invalid 0: No1: YesBit 12: Channel 5 value is invalid 0: No1: YesBit 13: RHO3 value is invalid 0: No1: YesBit 14: BRDF correction is invalid 0: No1: YesBit 15: Polar flag, latitude over 60 degrees (land) or 50 degrees (ocean) 0: No1: Yes

  • Bit 0: Unused
    • 0: No
    • 1: Yes
  • Bit 1: Pixel is cloudy
    • 0: No
    • 1: Yes
  • Bit 2: Pixel contains cloud shadow
    • 0: No
    • 1: Yes
  • Bit 3: Pixel is over water
    • 0: No
    • 1: Yes
  • Bit 4: Pixel is over sunglint
    • 0: No
    • 1: Yes
  • Bit 5: Pixel is over dense dark vegetation
    • 0: No
    • 1: Yes
  • Bit 6: Pixel is at night (high solar zenith)
    • 0: No
    • 1: Yes
  • Bit 7: Channels 1-5 are valid
    • 0: No
    • 1: Yes
  • Bit 8: Channel 1 value is invalid
    • 0: No
    • 1: Yes
  • Bit 9: Channel 2 value is invalid
    • 0: No
    • 1: Yes
  • Bit 10: Channel 3 value is invalid
    • 0: No
    • 1: Yes
  • Bit 11: Channel 4 value is invalid
    • 0: No
    • 1: Yes
  • Bit 12: Channel 5 value is invalid
    • 0: No
    • 1: Yes
  • Bit 13: RHO3 value is invalid
    • 0: No
    • 1: Yes
  • Bit 14: BRDF correction is invalid
    • 0: No
    • 1: Yes
  • Bit 15: Polar flag, latitude over 60 degrees (land) or 50 degrees (ocean)
    • 0: No
    • 1: Yes

* = Values are estimated

影像属性:

Name

Type

Description

status

String

'provisional' or 'permanent'

数据说明:

The NOAA CDR Program’s official distribution point for CDRs is NOAA’s National Climatic Data Center which provides sustained, open access and active data management of the CDR packages and related information in keeping with the United States’ open data policies and practices as described in the President's Memorandum on "Open Data Policy" and pursuant to the Executive Order of May 9, 2013, "Making Open and Machine Readable the New Default for Government Information". In line with these policies, the CDR data sets are nonproprietary, publicly available, and no restrictions are placed upon their use. For more information, see the Fair Use of NOAA's CDR Data Sets, Algorithms and Documentation pdf.

引用:

Eric Vermote, Chris Justice, Ivan Csiszar, Jeff Eidenshink, Ranga Myneni, Frederic Baret, Ed Masuoka, Robert Wolfe, Martin Claverie and NOAA CDR Program (2014): NOAA Climate Data Record (CDR) of AVHRR Surface Reflectance, Version 4. [indicate subset used]. NOAA National Climatic Data Center.NOAA Climate Data Record (CDR) of AVHRR Surface Reflectance, Version 4 (Version Superseded)

代码:

代码语言:javascript
复制
var dataset = ee.ImageCollection('NOAA/CDR/AVHRR/SR/V4')
                  .filter(ee.Filter.date('2018-05-01', '2018-06-01'));
var surfaceReflectance = dataset.select('SREFL_CH1');
var surfaceReflectanceVis = {
  min: -1000.0,
  max: 9000.0,
  palette: ['003b02', '006a03', '008d05', '01be07', '01ff09', 'ffffff'],
};
Map.setCenter(52.48, 71.72, 0);
Map.addLayer(surfaceReflectance, surfaceReflectanceVis, 'Surface Reflectance');

Dataset Availability

1981-06-24T00:00:00 - 2021-09-28T00:00:00

Dataset Provider

NOAA

Collection Snippet

ee.ImageCollection("NOAA/CDR/AVHRR/SR/V5")

代码:

代码语言:javascript
复制
var dataset = ee.ImageCollection('NOAA/CDR/AVHRR/SR/V5')
                  .filter(ee.Filter.date('2018-05-01', '2018-06-01'));
var surfaceReflectance = dataset.select('SREFL_CH1');
var surfaceReflectanceVis = {
  min: -1000.0,
  max: 9000.0,
  palette: ['003b02', '006a03', '008d05', '01be07', '01ff09', 'ffffff'],
};
Map.setCenter(52.48, 71.72, 1);
Map.addLayer(surfaceReflectance, surfaceReflectanceVis, 'Surface Reflectance');
本文参与 腾讯云自媒体分享计划,分享自作者个人站点/博客。
原始发表:2024-02-01,如有侵权请联系 cloudcommunity@tencent.com 删除

本文分享自 作者个人站点/博客 前往查看

如有侵权,请联系 cloudcommunity@tencent.com 删除。

本文参与 腾讯云自媒体分享计划  ,欢迎热爱写作的你一起参与!

评论
登录后参与评论
0 条评论
热度
最新
推荐阅读
领券
问题归档专栏文章快讯文章归档关键词归档开发者手册归档开发者手册 Section 归档