The so-called German camera evaluation project was initiated by the German society of Photogrammetry, Remote Sensing and Geoinformation (DGPF) in order to allow for comprehensive empirical test on photogrammetric digital airborne camera systems. During this test, the digital camera systems DMC, Ultracam-X, ADS40 (2nd generation), JAS-150, Quattro DigiCAM and AIC-x1 were flown in the test site V...

ضرورت دسترسی به کاربردهای وسیع تصاویر ابرطیفی سبب توسعة سیستم‌های تصویربرداری نوآورانه و اقتصادی در ثبت این شده است. به‌منظور استفاده از تصاویر، لازم است ارتباط هندسی دقیقی میان آنها فضای زمین برقرار شود فرایند نیازمند نقاط کنترلی بسیاری نکته راهکارهای اصلاح منطبق با ساختار هریک دوربین‌ها را بارز می‌کند. سنجندة (nm 400-1000) BaySpec OCI-F یکی نوآورانه‌ای که هندسة پوش‌بروم دریافت سنجنده، علاوه‌ب...

ABSTRACT We present simultaneous, multicolour optical light curves of the companion star to black-widow pulsar PSR J2051−0827, obtained approximately 10 yr apart using ULTRACAM and HiPERCAM, respectively. The confirm previously reported asymmetry in which leading hemisphere appears be brighter than trailing hemisphere. HiPERCAM curves, however, do not show this asymmetry, demonstrating that wha...

Digital aerial cameras have replaced analog film cameras. An information contents corresponding to aerial photos up to 2010 was only possible with digital system cameras as Vexcel Ultracam and Z/I Imaging DMC or line scanning cameras as Leica Geosystems ADS80 or Jena Optronic JAS-150. Now with very large size CCDs the panchromatic band of the DMC II has between 140 and 256 Mega pixels from one ...

We present high-speed, multi-colour optical photometry of the anomalous X-ray pulsar 4U0142+61, obtained with ULTRACAM on the 4.2-m William Herschel Telescope. We detect 4U0142+61 at magnitudes of i = 23.7± 0.1, g = 27.2± 0.2 and u > 25.8, consistent with the magnitudes found by Hulleman et al. (2004) and hence confirming their discovery of both a spectral break in the optical and a lack of lon...

We report X-ray observations of the newly discovered pulsating white dwarf eRASSU J191213.9-441044 with Spectrum Roentgen Gamma and eROSITA (SRG/eROSITA) XMM-Newton. The new source was during first all-sky survey at a flux level fX (0.2 - 2.3 keV) = 3.3 e-13 erg cm-2 s-1 found to be spatially coincident G 17.1 stellar Gaia-source distance 237 pc. dropped about 1 three following surveys remained...