We currently make two classes of PlanetScope imagery available to our customers, standard and test.
To qualify for "standard" image quality an image must meet the following criteria: sun altitude greater than or equal to 10 degrees, off nadir view angle less than 20 degrees, and saturated pixels fewer than 20%. If the image does not meet these criteria it is considered "test" quality.
Each individual PlanetScope scene’s metadata contains an
image_statistics.image_quality property that indicates the quality of that particular image.
Planet is also continuously improving the performance of the telescopes that we put into space, and there is a significant improvement in the quality of newer images. You might see reference to PlanetScope 1 (PS1) and PlanetScope 2 (PS2) imagery within PlanetScope scene’s metadata
instrument property which indicates the generation of telescope that was used to capture an image. All new Planet satellites will host a PS2 sensor.