VIIRS/JPSS1 Moderate-Resolution Dual Gain Bands Calibrated Radiance 6-Min L1B Swath 750 m NRT

The VIIRS/JPSS1 Moderate-Resolution Dual Gain Bands Calibrated Radiance 6-Min L1B Swath 750m Near Real Time (NRT) product, short-name VJ102GDC_NRT contains unaggregated, calibrated TOA radiances for those VIIRS sub-pixel samples that are aggregated along-scan during post-calibration ground processing. In other words, this file contains the calibrated M1 - M5, M7 and M13 dual gain band data from the nadir and near-nadir zones that would otherwise be discarded following post-calibration aggregation/Earth View Radiometric Calibration Unit.

The Level-1 and Level-2 swath products are generated from the processing of 6 minutes of VIIRS data acquired during the JPSS1 satellite overpass. The VIIRS sensor has 5 high-resolution imagery channels (I-bands) that have 32 detectors (32 rows of pixels per scan), with twice the resolution of the M-bands and the DNB, that span the wavelengths from 0.640 micron to 11.45 micron. There are also 7 dual-gain VIIRS bands. The dual gain moderate resolution bands (M1 to M5, M7 and M13) have 6304 samples and the other moderate resolution bands have 3200.

For additional information, see the Algorithm Theoretical Basis Document (ATBD) for the L1B product (https://ladsweb.modaps.eosdis.nasa.gov/missions-and-measurements/viirs/…). The document describes how VIIRS operates in space and provides the equations implemented by the L1B software to generate the MODIS Level-1 intermediate products. It is a summary document that presents the formulae and error budges used to transform VIIRS digital counts to radiance and reflectance.

该VIIRS/JPSS1中分辨率双增益波段校准辐射6分钟L1B带状产品，简称VJ102GDC_NRT，包含在地面后校准处理过程中沿扫描方向进行聚合的VIIRS亚像素样本的非聚合、校准的TOA辐射亮度。换言之，该文件包含了来自视场和近视场区域的校准M1-M5、M7和M13双增益波段数据，这些数据在地面后校准聚合/地球视场辐射校准单元处理过程中本应被舍弃。

一阶和二阶带状产品是通过处理JPSS1卫星过境期间获取的6分钟VIIRS数据进行生成的。VIIRS传感器具有5个高分辨率成像通道（I波段），每个通道包含32个探测器（每扫描32行像素），其分辨率是M波段和DNB的两倍，波长范围从0.640微米到11.45微米。此外，还有7个双增益VIIRS波段。双增益中分辨率波段（M1至M5、M7和M13）包含6304个样本，而其他中分辨率波段包含3200个样本。

欲获取更多信息，请参阅L1B产品的算法理论基础文档（ATBD）（https://ladsweb.modaps.eosdis.nasa.gov/missions-and-measurements/viirs/…）。该文档描述了VIIRS在空间中的工作原理，并提供了L1B软件实现的将VIIRS数字计数转换为辐射亮度和反射率的方程。这是一份总结性文件，其中展示了用于将VIIRS数字计数转换为辐射亮度和反射率的公式和误差预算。