Satellite images (10x10 pixels) centered at Folsom, CA (lat=38.642N, lon=121.148W)

Satellite images centered on Folsom, CA (lat=38.642N, lon=121.148W). This dataset includes images from GOES-15, which operated as GOES-West from 2011 until February 2019, when it was superseded by GOES-17.<br> The Earth-facing imager on GOES-15 has five spectral bands: one visible band centered at 0.63\(\mu m\) and four infrared bands centered at 3.9, 6.5, 10.7, and 13.3\(\mu m \), respectively. This data includes measurements from the visible band (VIS), which has a spatial resolution of 1.0 km and a temporal resolution of one image every 30 minutes. Each image of 10 pixels x 10 pixels is flattened into a vector \(\tilde{x}\). Each image is then normalized as \(x_i = \frac{ \tilde{x}_i-\text{avg}(\tilde{x})}{\sqrt{ \text{var}(\tilde{x})+10}}\) where \(\tilde{x}\) is the unprocessed 8 bit grayscale image vector, avg is the arithmetic mean value, and var is the variance. Each line in the csv file corresponds to a single image.<br> The first column is the image timestamp in UTC.<br> The values that follow the timestamp correspond to 100 normalized gray-scale values obtained using the algorithm described above.该数据集的影像以美国加利福尼亚州福尔瑟姆（Folsom, CA）为中心，地理坐标为北纬38.642°，西经121.148°。 本数据集包含GOES-15卫星的观测影像，该卫星在2011年至2019年2月期间以GOES-West（西向运行的地球静止业务环境卫星）的身份运行，后续由GOES-17接替其在轨任务。 GOES-15搭载的对地成像仪共配备5个光谱波段：1个中心波长为0.63μm的可见光波段，以及4个分别中心波长为3.9μm、6.5μm、10.7μm和13.3μm的红外波段。 本次数据集包含可见光波段（VIS）的观测数据，其空间分辨率为1.0千米，时间分辨率为每30分钟获取一帧影像。 每张尺寸为10像素×10像素的影像会被展开为向量$ ilde{x}$。随后对每张影像执行归一化处理，归一化公式为： [x_i = frac{ ilde{x}_i - ext{avg}( ilde{x})}{sqrt{ ext{var}( ilde{x}) + 10}}] 其中$ ilde{x}$为未经过预处理的8位灰度影像向量，$ ext{avg}$代表算术平均值，$ ext{var}$代表方差。 CSV文件中的每一行对应单幅影像：第一列为该影像的UTC时间戳，时间戳之后的数值为通过上述算法计算得到的100个归一化灰度值。