With their small size and great flexibility, Ocean Optics spectrometers and accessories are ideal for remote sensing. Units can be used separately or embedded into other devices to monitor conditions in environments not easily accessible or too hazardous for in situ measurements.
Spectrometers can be positioned for measurements from planes, unmanned aerial vehicles (UAVs) and even all-terrain vehicles for remote sensing measurements, including the characterization of surface waters and atmospheric ozone, the quantification of green vegetation, and the measurement of soil erosion. By taking advantage of the light weight and reliable performance of the spectrometers, customers are able to capture data quickly and confidently.
This ultra-compact, lightweight UV-Vis-NIR spectrometer is an excellent choice for remote measurements.
Example Setup: Upwelling-Downwelling Measurement
Upwelling is radiation — either reflected solar or emitted terrestrial — that is directed upward from the Earth’s surface. Downwelling radiation is directed toward the Earth’s surface from the sun or atmosphere. The relationship between the two (albedo) can be used to derive spectral information from vegetation, forest canopies, seabeds and more.
An HR2000+CG high-resolution spectrometer is one option for upwelling and downwelling measurements; a two-channel Jaz spectrometer is an alternative that offers slightly different advantages. Also, in some instances, customers have measured upwelling-downwelling characteristics using a combination of airborne and ground-based spectrometers. For the former, a super-lightweight option like our STS microspectrometer or the USB2000+ spectrometer is recommended.
The HR2000+CG spectrometer is configured with a 5 µm entrance slit for optical resolution of <1.0 nm (FWHM); a composite grating for response from 200-1050 nm; and an order-sorting filter to eliminate second- and third-order effects.
The spectrometer connects to a patch cord that couples to the CC-3-UV cosine corrector. The CC-3-UV can be used as part of a fiber-plus-diffuser configuration for measuring absolute spectral irradiance. You’ll need a DH-2000-CAL to calibrate the absolute spectral response of the system and OceanView spectroscopy operating software to calculate spectral intensity and photopic data in lumens, lux or candela. An alternative to the CC-3-UV is a Gershun tube, which has fixtures for adjusting the field of view from 1° to 28° and attaches directly to the spectrometer or to an optical fiber.
Airborne measurements can provide insight on environmental aspects of cropland development.
Spectroscopic techniques are ideal for monitoring the interaction of solar radiation with the atmosphere.