An optical communications link design tool for long-term mission planning for deep-space missions

Ultra-high-speed data relay systems

“…Finally is the SI loss, respectively. The former can be calculated with a method from [43], and the latter with an expression from [23] =…”

Optical satellite networks performance

“…To start with, the majority of telescopes used for optical satellite communications have central obscurations, such as the secondary mirror of the Cassegrain telescopes [Manning], [Moision12]. This type of telescopes consists of two mirrors, a primary and a secondary.…”

“…The transmitter aperture gain t G is calculated based on the assumptions that the transmitter has a laser source characterized as single mode Gaussian emission, the antenna gain patterns are measured in the far field and its aperture is circular [ITU1742], [Klein74]. Consequently, for a Gaussian profile laser amplitude beam projected through a circular, centrally obscured aperture, in the direction of optical axis (onaxis gain) assuming far-field and plane wave approximations, the transmitter aperture gain is given by [Moision12] 1.12 optimal t a …”

“…This random delay, is called detector jitter and it produces losses ( In [Moision08] analytical expressions for the computation of jitter loss and interesting plots of jitter detector loss, as a function of the normalized jitter variance (σ j /T slot ), for different input parameters are reported. Now, the expression of the approximated method of [Moision08], which is reported in [Moision08] and [Moision12] for the computation of jitter detector loss, is reported bellow:…”

“…In the case of receiver gain we assume that the signal source is sufficiently far away so that plane waves arrive on the receiver aperture[Degnan74]. Afterwards, the receiver gain is expressed as[Biswas03], [ITU1742],[Manning],[Moision12]: s primary aperture diameter (m), r b : receiver's secondary aperture diameter(m), λ: wavelength of incoming signal. r  : receiver's obscuration ratio, no obscuration i.e.…”