A multispectral reflectance panel, also known as a reflectance calibration target or color calibration target, is a specialized tool used in remote sensing and imaging applications. It is designed to have known and stable reflectance properties across multiple spectral bands or wavelengths.

The panel consists of a flat surface divided into several patches, each with a different known reflectance value. These reflectance values are typically measured or calibrated using a spectrometer or other specialized instruments.

Multispectral reflectance panels are used to calibrate remote sensing instruments, such as satellites or airborne sensors, to ensure accurate and consistent measurements of the Earth’s surface. By imaging the panel under controlled conditions, the instrument can compare the measured reflectance values of the panel’s patches to their known values. This allows for adjustments and calibration of the instrument’s measurements, compensating for any variations or biases.

The panels are often constructed to have high reflectance uniformity and stability over time. They can be made using various materials, such as specially designed paints, ceramics, or polymers, depending on the spectral range of interest.

Multispectral reflectance panels are crucial for maintaining the accuracy and reliability of remote sensing data, enabling researchers to compare and analyze images acquired at different times or from different sensors. They play a vital role in applications such as environmental monitoring, agriculture, land cover mapping, and scientific research.