Ahmad Maryanto, Ahmad
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DEVELOPMENT OF PUSHBROOM AIRBORNE CAMERA SYSTEM USING MULTISPECTRUM LINE SCAN INDUSTRIAL CAMERA Maryanto, Ahmad; Widijatmiko, Nugroho; Sunarmodo, Wismu; Soleh, Muhammad; Arief, Rahmat
International Journal of Remote Sensing and Earth Sciences (IJReSES) Vol 13, No 1 (2016)
Publisher : National Institute of Aeronautics and Space of Indonesia (LAPAN)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1392.68 KB) | DOI: 10.30536/j.ijreses.2016.v13.a2701

Abstract

One of the steps on mastery the remote sensing technology (inderaja) for satellite was the development of aerial camera prototype that could be an alternative for LAPAN light cargo aircraft mission (LAPAN Surveillance Aircraft, LSA-01). This system was expected could be operated to fulfill the emptiness or change the remote sensing data of optical satellite as the observer of vegetation covered by cloud. On this research, it was developed a prototype of pushbroom airborne camera 4-channels spectrum with very high resolution that worked on wavelength range seem near infra-red/ NIR used simple components that were available in the commercial market (commercial off-the-shelf/ COTS components). This research also developed georeference imagery software module used method of direct georeference rigorous model that had been applied on SPOT satellite. For this one, it was installed supported sensory for GPS and IMU as the writer of location coordinate and camera behavior while doing the imagery exposure or acquisition. The testing result gave confirmation that COTS components, such as industry camera LQ-200CL, and lower class GPS and IMU could be integrated became a cheaper remote sensing system, which its imagery product could be corrected systematically. The corrected data product showed images with GSD 0.4m still had positioning mistakes on average 157m (400 pixel) from the original position on GoogleEarth. On spectro-radiomatic aspect, the used camera had much higher sensitivity of NIR channel than the looked-channel so it caused bored faster. On the future, this system needed to be fixed by increasing the rate of GPS/ IMU data updates, and increased enough time resolution system so that the synchronization process and the availability supported data for completing more accurate georeference process. Besides, the sensitivity of NIR channel needed to be lower down to make it balance to the looked-channel.
SIMULATION OF DIRECT GEOREFERENCING FOR GEOMETRIC SYSTEMATIC CORRECTION ON LSA PUSHBROOM IMAGER Soleh, Muchammad; Sunarmodo, Wismu; Maryanto, Ahmad
International Journal of Remote Sensing and Earth Sciences (IJReSES) Vol 14, No 1 (2017)
Publisher : National Institute of Aeronautics and Space of Indonesia (LAPAN)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (977.383 KB) | DOI: 10.30536/j.ijreses.2017.v14.a2630

Abstract

LAPAN has developed remote sensing data collection by using a pushbroom linescan imager camera sensor mounted on LSA (Lapan Surveillance Aircraft). The position accuracy and orientation system for LSA applications are required for Direct Georeferencing and depend on the accuracy of off-the-shelf integrated GPS/inertial system, which used on the camera sensor. This research aims to give the accuracy requirement of Inertial Measurement Unit (IMU) sensor and GPS to improve the accuracy of the measurement results using direct georeferencing technique. Simulations were performed to produce geodetic coordinates of longitude, latitude and altitude for each image pixel in the imager pushbroom one array detector, which has been geometrically corrected. The simulation results achieved measurement accuracies for mapping applications with Ground Sample Distance (GSD) or spatial resolution of 0,6 m of the IMU parameter (pitch, roll and yaw) errors about 0.1; 0.1; and 0.1 degree respectively, and the error of GPS parameters (longitude and latitude) about 0.00002 and 0.2 degree. The results are expected to be a reference for a systematic geometric correction to image data pushbroom linescan imager that would be obtained by using LSA spacecraft.
ESTIMATION OF RADIOMETRIC PERFORMANCE OF ELEKCTRO-OPTICAL IMAGING SENSOR OF LOW EARTH EQUATORIAL ORBIT LAPAN SATTELITE Maryanto, Ahmad; Indradjad, Andy; Sirin, Dinari Nikken; Widipaminto, Ayom
International Journal of Remote Sensing and Earth Sciences (IJReSES) Vol 9, No 1 (2012)
Publisher : National Institute of Aeronautics and Space of Indonesia (LAPAN)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1187.537 KB) | DOI: 10.30536/j.ijreses.2012.v9.a1825

Abstract

Study  of  spectro-radiometric  performance  of  electro-optical  imager  which  is planned  to  be  launched  on  low  earth  equatorial  orbit  LAPAN  satellite  was  conducted through  simulative  calculation  of  image  irradiance  and  its  associated  generated  voltage  at the image detector output. Simulative calculation was applied to three scenarios of selected spectral  bands.  Those  spectral  bands  were  selected  spectra  (1),  which  consisted  of  spectral bands  B = (390-540 and 790-900) nm,  G = (470-610 and 700-900 )  nm, and R = (590-650 and 650-900) nm; selected spectra (2) consisted  of B1 = (390-540) nm,  G1 = (470-610) nm, and  R1  =  (590-650)  nm;  and  selected  spectra  (3)  consisted  of  B1(Green)  =  (525-605)  nm, B2(Red) = (630-690) nm, and B3(NIR) = (750-900) nm, on three scenarios of optical aperture or f-number (N)  2.8, 4.0, and  5.6.  Green grasses, dry  grasses, and conifers  were examples of the imaged target, chosen as representation of vegetations. Kodak KLI-8023 was used as the  optical  detector.  The  integration  time  was  assumed  3  miliseconds  which  correspond  to about 20 m ground sampling distance (GSD). Solar zenith angle were varying from 90 (early morning)  to  0  (solar  noon).  The  results  showed  that  option  (3)  of  selected  spectra,  as proposed  for  pushbroom  imager  of  LAPAN  satellite,  was  relatively  accepted  to  be implemented  and  complemented  with  f-number  4.0  of  optical  system  used.  Whereas simulation RGB color displayed  composed by R = B2(Red), G = B3(NIR), B = B1(Green) also showed a greenish color sense as expected for vegetation imaged target.