Fuad F. Rahman’s scientific contributions

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Publications (1)

Fig. 1. Location of the observed point
Fig. 2. Position error of ITB01
Fig. 3. Skyplot of BDG066 and ITB01
Fig. 5. Percentage for each solution TTG693 has the lowest percentage of fixed dual solution compared to the others. TTG693 suffer a bad obstruction condition. It has a lot of vegetation. In this condition, ambiguity fixing is very difficult to obtain so that it takes time to the first ambiguity fixing. Overall, the ambiguity fixing percentage is decreasing along with the increasing of the baseline length as seen on Fig. 6.
Fig. 6. Ambiguity fixing percentage over baseline length

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Variability and Performance of Short to Long-Range Single Baseline RTK GNSS Positioning in Indonesia
  • Article
  • Full-text available

January 2019

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341 Reads

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10 Citations

E3S Web of Conferences

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Fuad F. Rahman

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I Made D. A. Hermawan

As the modernized Global Navigation Satellite System (GNSS) method, Real Time Kinematic (RTK) ensures high accuracy of position (within several centimeters). This method uses Ultra High Frequency (UHF) radio to transmit the correction data, however, due to gain and power issues, Networked Transport of RTCM via Internet Protocol (RTCM) is used to transmit the correction data for a longer baseline. This Research aims to investigate the performance of short to long-range single baseline RTK GNSS (Up to 80 KM) by applying modified LAMBDA method to resolve the ambiguity in carrier phase. The RTK solution then compared with the differential GNSS network solution. The results indicate that the differences are within RTK accuracy up to 80 km are several centimeter for horizontal solution and three times higher for vertical solution.

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Citations (1)

... The numbers shown in Table 1 show that in a DGNSS case applied to a typical lunar scenario, the ratio becomes significantly higher when compared to terrestrial applications. In the long-baseline DGNSS terrestrial applications presented in the literature, the dominant error factor becomes the ionospheric and tropospheric delays between the cooperating users such that the effect of the bias introduced by the assumption in Equation (13) in the algorithm itself is not analyzed [68][69][70]. On top of the introduction of a bias due to the large ISR values, Figure 4 also confirms that such a differential scenario in space is also characterized by large relative velocities between the involved users, as anticipated in Section 2.2.1. ...

Reference:

Code-Based Differential GNSS Ranging for Lunar Orbiters: Theoretical Review and Application to the NaviMoon Observables
Variability and Performance of Short to Long-Range Single Baseline RTK GNSS Positioning in Indonesia

E3S Web of Conferences

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Fuad F. Rahman

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I Made D. A. Hermawan