Abdul Rachman

Indonesian National Institute of Aeronautics and Space | LAPAN · Space Science Center

The Faculty of Mathematics, Physics and Informatics of Comenius University in Bratislava, Slovakia (FMPI) operates its own 0.7-m Newtonian telescope (AGO70) dedicated to the space surveillance tracking and research, with an emphasis on space debris. The observation planning focuses on objects on geosynchronous (GEO), eccentric (GTO and Molniya) and...

The identification of space debris and the prediction of its orbital lifetime are two important things in the initial mitigation processes of threat from falling debris. As a part of the development of related decision support system, this study focuses on developing a basic lifetime model of artificial space object based on a well-known theory and...

Studies on atmospheric density were very important to obtain a correction factor for the atmospheric density model. Thus, improvement of atmospheric models accuracy, i.e. CIRA, JASCHIA, NRLMSISE, became important in its application for re-entry prediction, satellite tracking and mitigation of the collisions probability between active satellites wit...

Studies on atmospheric density were very important to obtain a correction factor for the atmospheric density model. Thus, improvement of atmospheric models accuracy, i.e. CIRA, JASCHIA, NRLMSISE, became important in its application for re-entry prediction, satellite tracking and mitigation of the collisions probability between active satellites wit...

Ludendorff coronal flattening index of the Total Solar Eclipse (TSE) on March 9, 2016, was calculated at various distances in solar radius. As a result, we obtained the coronal flattening index $\left(\epsilon =a+b\right)$ at a distance of 2 solar radii is 0.16. The $24^{th}$ solar cycle phase based on the 2016 TSE event obtained -0.64 which showed...

Two-line elements (TLE) of an artificial space object can be generated from optical observations with modest instruments. In this preliminary study, ObsReduce was utilized for astrometric analysis to produce positional observations in IOD (Interactive Orbit Determination) format and ELFIND to generate the expected TLE. It turned out that analysis o...

An increasing number of space junk in orbit has raised their chances to fall in Indonesian region. So far, three debris of rocket bodies have been found in Bengkulu, Gorontalo and Lampung. LAPAN has successfully developed software for monitoring space debris that passes over Indonesia with an altitude below 200 km. To support the software-based sys...

Observation of satellite & space debris encircling the Earth at low orbit can be conducted in optical window. Observation system that utilizes digital camera equipped with telescopic lens was developed by Space Science Center of LAPAN. More than hundred frames of wide field photograph were produced during observation campaign in August 2014. In thi...

Optical observation through sub-meter telescope equipped with CCD camera becomes alternative method for increasing orbital debris detection and surveillance. This observational mode is expected to eye medium-sized objects in higher orbits (e.g. MEO, GTO, GSO \& GEO), beyond the reach of usual radar system. However, such observation of fast-moving o...

Understanding solar wind structures associated with anomalies experienced by a satellite can be useful in the prediction of satellite anomalies. This study uses solar wind and interplanetary magnetic field (IMF) parameters to identify the type of solar wind disturbances associated with the reported anomaly experienced by Garuda 1 satellite on Apri...

Any man-made object in Earth's orbit that no longer serves a useful purpose is classified as orbital debris. Debris objects come from a variety of sources. The majority is related to satellite fragmentation. Other major sources of debris are propulsion systems, and fragmentation of spent upper stages, payload and mission related debris. Seriou...

Extreme condition of space environment due to solar activity cause serious effects on satellites, either the anomaly effect or orbital decay. Orbital decay is due to the increase of atmospheric density, especially for low earth orbit satellites. Lapan-Tubsat and Lapan's next generation satellites will be placed in LEO orbit, so it is necessary to d...

One of the factors that determines the lifetime of low-earth orbit satellites is their ballistic coefficient. This study compared the total atmospheric density obtained from data processing of two-line elements (TLE) for LAPAN-TUBSAT satellite with the density based on a standard empirical model MSISE-90. This is accomplished by varying the value o...

Dissemination Information system for spacecraft reentry was upgraded from temporary to automatic information including three subtantial technical aspects consist of software for upgrading the spacecraft reentry surveillance, spacecraft reentry information analysis for surveillance and identification and general information for spacecraft reentry. T...

An automatic software to monitor decaying space objects has been developed. By utilizing orbital database of space objects published by Space-track (www.spacetrack. org), this simple tool can be used to know which objects have passed, currently passing, or will pass above Indonesia near the mean atmospheric decay of reentry objects which is ass...

A procedure to monitor decaying space object by using data sources from internet and satellite orbit softwares has been developed. Techniques used in the procedure have been applied since the beginning of 2009 and now we can conclude that the procedure is effective with assumption that there are no troubles with the access to the data sources. One...