There is growing interest in designing a future lunar navigation satellite system (LNSS) while
utilizing a SmallSat platform. However, many design decisions, eg, regarding the satellite …

Abstract In Precise Point Positioning (PPP), the receiver clock parameter is typically
estimated independently in each observation epoch, which increases the noise of the …

After more than fifty years since the Apollo program, we are encountering a revived, second
Space Race with international space agencies seeking to not only return humans to the …

Global navigation satellite system (GNSS) receivers belonging to the International GNSS
Service (IGS) are equipped with different types of clocks, such as internal crystal quartz …

The Software-Defined Receiver (SDR) is a rapidly evolving technology which is a useful tool
for researchers and allows users an extreme level customization. The main aim of this work …

Global Navigation Satellite Systems (GNSS) deliver absolute position and velocity, as well
as time information (P, V, T). However, in urban areas, the GNSS navigation performance is …

In PPP-RTK processing, the network corrections including the satellite clocks, the satellite
phase biases and the ionospheric delays are provided to the users to enable fast single …

There has been a growing interest in using small satellites (SmallSats) for a future lunar
navigation and communication satellite system (LNCSS). We conceptualize the design of a …

In urban canyons, the reflections and obstructions of Global Navigation Satellite System
(GNSS) signals frequently lead to significant errors in measurements, the number of which …

For the future lunar navigation satellite system (LNSS), a GPS-like constellation for the
Moon, NASA has expressed interest in using a smallsat platform. However, many design …