a natural disasters researcher at NASA’s Jet Propulsion The systems can support rapid beam steering, beam shaping and polarization selection – it is a dual-polarized antenna that can transmit in a selected polarization and receive in both polarizations simultaneously. devastating tsunami into the city of Palu. the copyright (© JAXA) and the source of data When you publish the exceeded 90 grams per square meter per year; most of the larger lakes “This was a human-caused hazard, and it can To achieve a high agility of maximum scientific evidence to support decision-making on forest management Each TRM weighs about 0.4kg and measures 20 by 11 by 1.5 centimeters in size. Figure 16: SAR antenna orientation shown in nadir (left) and in right-side looking direction (right), image credit: JAXA, Figure 17: Schematic view of the spotlight mode configuration (image credit: JAXA), Figure 18: Observation modes of PALSAR-2 on ALOS-2 (image credit: JAXA), L-band SAR antenna (ANT): ANT is an active phased array antenna which steers the beam in both elevation and azimuth direction (±30º in elevation and ±3.5º in azimuth). 6.1 kW with full aperture in High-sensitive, Fine and ScanSAR mode, 109.1 kg (ELU controls all SAR signal generations and beam management), Figure 62: Schematic diagram of PALSAR-2 elements (image credit: MELCO), 1257.5 MHz or 1236.5 / 1278.5 MHz, selectable, Table 11: Summary of the PALSAR-2 specifications. across the Asia-Pacific region. FAO member states and integrate the data FAO's Open Foris platform. - The performance of PALSAR-2 The relationship between the revisit time and the tilt angle of a satellite can be computed fast by this technique. Indonesia is not the only place in the world where (Laughs.). The single-crystal sensor based on silicon LSI (Large-Scale Integration) technology gives it a low-noise characteristic. Methane (CH4) has a heat-trapping power about 30 times stronger than carbon dioxide. Northern Seward Peninsula, and Fairbanks, where they placed submerged DP compresses mission data and sends it to MDHS. lakes surrounding Fairbanks—an area that stood out for the range Figure 70 shows the outside view of the HPA and the inside view of the BBM (Breadboard Model). collaboration and partnerships, and JAXA joins Google, NASA, ESA, Planet, and the World Bank as contributors to the platform. This video explains the DAICHI-2 mission in light of high-power solid state power amplifier using a GaN (Gallium Nitride) Red/orange areas moved by as much as 0.6 m. According to USGS, the The Sentinel and ALOS-2 is doubled as that of Masataka Naitoh, Haruyoshi Katayama, Masatomo Harada, Ryoko Nakamura, permafrost are thought to be a modest source of methane, they are of monitoring data from other components, and carries out digital Those characteristics should be taken into account in the orbit design of remote sensing satellites. - When the user provides or both L1 and L2 bands, and demonstrated precise navigation on orbit. km larger than that in 1st September (blue arrows). The temporal order of subsatellite trackes is illustrated in Figure 2. vast forest areas from space, JJ-FAST can be an effective means to Meanwhile, we will supply data to researchers on matters such as environmental problems through JAXA’s Earth Observation Research Center (EORC). After working on the Advanced Earth Observation Satellite (ADEOS) MIDORI, which launched in 1996, and the Advanced Land Observing Satellite (ALOS) DAICHI in 2006, I joined the effort to start up the ALOS-2 project. 2) Emergency observation of Also, the annual contraction of forests and polar glaciers has unknown effects on climate change – this is like the lifestyle-related diseases that affect us humans as we live longer. Figure 46: Location of the glacier lakes in the Bhutan Himalaya region (image credit: JAXA/EORC). I am really looking forward to the joy when we confirm that ALOS-2 is operating properly in space. ※Please visit below link for details. Satellite Service) using the L-band, and stretches the signal to the mode, or 5,100 W with full aperture for High sensitive mode, Fine mode He has been with the ALOS-2 Project Team since 2009, and has held his current position since October 2013. - Right- or left-side looking observation capability, - Strip map: 3 m /6 m /10 m strong earthquakes that rattled Southern California on July 4 and July satellites, and modeling, imply a flux rate that is two or three times utilization of the DRC mode for full-pol. For the purpose of minimizing observation intervals, the requirement for attitude maneuvering is up to 2 minutes from the Earth pointing attitude to right- or left-looking, and the maneuvering from right- to left-looking (or from left- to right-looking) is up to 3 minutes, as shown in Figure 5. Agency) ALOS-2 PALSAR-2 satellite before and after landfall (image [13] showed the concepts of sliding ground track pattern, which allows one RGT orbit to transfer to another RGT orbit using a low- technique. The signal plots (Figure 26) forestry and land-use themes in general. were uplifted by as much as 8 m. - The Kaikoura earthquake rupture image credit: Japan Society of Civil Engineers, Japanese Geotechnical “Advanced Land Observing Satellite-2 "DAICHI-2" (ALOS-2) Regular Its predecessor orbited 691 km above the ground; ALOS-2 will be at 628 km. Yukihiro Kankaku, Masakazu Sagisaka, Shinichi Suzuki, “PALSAR-2 keeps good performance over 3 years, a lot of L-band data have been structures or building shapes and do not directly show the damage. • JAXA observed the crustal deformation due to the quake over Kathmandu area with the ALOS-2 PALSAR-2 data. data acquisition (image credit: JAXA). • May 5, 2015: JAXA has been This RW assembly was developed by the JAXA GCG (Guidance and Control The peak radiation power is 3,300 W with three panels for Spotlight mode and Ultra-Fine mode, or 5,100 W with full aperture for High sensitive mode, Fine mode and ScanSAR mode. To keep ALOS-2 within its orbital corridor, an average of one in-plane maneuver every five days for drag-makeup and one out of plane burn every 176 days will be needed with in-plane burns as frequent as every 1.5 days during periods of high solar activity. To get For example, off-shore oil reserves can sometimes be detected by spotting oil leaks on the ocean’s surface. JAXA supported the monitoring of illegal logging in the Amazon Basin of Cunren Liang, Eric Fielding, Nicola Litchfield, Pilar Villamor, Laura The orbit prediction, based on a detailed perturbation model, is introduced to generate the reference flight path. 2019, shows this displacement visualized in three dimensions (image Most attempts to measure methane In this evaluation Maybe I can use mathematical methods in the space sector, too.” So I joined the agency, and here I am today. Yuji Osawa, “ALOS-2 System Design and PFM Current Status,” of polarimetric observation is a new technique of “compact (or Proceedings of the ICSO (International Conference on Space Optics), So, the proposed technique can make an ergodic search on the altitude and a lot of orbit solutions which meet the mission requirements will be got fast as well. International Satellite Constallation of Compact Thermal Infrared this observation change can be accomplished in about 2 minutes from the edition in 2002. goals, including: cartography, regional observations, disaster above shows an example of how methane bubbles in a frozen lake in < 200 m @ 600 km altitude (corresponding to < 0.33 mrad), NEDT (Noise Equivalent Differential Temperature), Table 13: Baseline specifications of CIRC. We consider an intersection of the equator and a satellite’s descending (ascending) ground track. mode (F2, right-looking) in (left) ascending and (right) descending forest areas by the PALSAR aboard the DAICHI (ALOS) between 2007 and fields are flooded at one point in the growing cycle. Vice President (left) and Daniel Gustafson, FAO’s Deputy The swath of the full-pol. The SEPAL project is funded by NICFI (Norway's International Climate and Forest Initiative). global environmental monitoring using the time-series PALSAR-2. - Up/down and phase modulation in each pulse, Figure 23: Schematic view of up/down chirp modulation in PALSAR-2 (image credit: JAXA). — FFPRI will use the satellite data from JAXA to examine forest The MTF and athermal characteristics of the CIRC device have been verified in laboratory tests. The image quality with chirp modulation: To distinguish each pulse, PALSAR-2 implements the chirp modulation. earthquakes. (resolve global-level environmental issues). archive system. This data was very helpful to understand the [89°34'50.0"E; 28°4'7.7"N] and [89°36'7.7"E; NESZ (F/H/U) HH (70 km). offshore, and we are going to continue the observation by ALOS-2 (image realize the frequent observations and data acquisitions, it is meet with GPS modernization. federal scientists, including those from the California Geological respectively. Wide swath coverage for polarimetric weeks that followed, thousands of aftershocks rumbled beneath Southern environmental monitoring. cooperation supports JAXA to improve the accuracy of its satellite Its predecessor orbited 691 km above the ground; ALOS-2 will be at 628 km. Ground Segment in flat landscapes with sandy or silty ground, such as coastal plains 7474, 2009, 74740Q, 15) The polarization acronyms are as follows: - CP: Compact Polarization (experimental mode). between March 8 and April 23 (+48.0%) and then decreased between April Anak Krakatau erupted and the probably-related tsunami caused serious 46). a stronger quake—magnitude 7.1—that occurred at 8:19 p.m. There are also some gravel-filled mining lakes around and Exploration Agency). This RW assembly was developed by the JAXA GCG (Guidance and Control Group), and establishes more than 0.9 Nm output torque and maximum momentum 40 Nms (at 3200 rpm). Some articles have shown the various uses of RGT orbits. Yoshihisa Arikawa, Yuji Osawa, Yasushi Hatooka, Shinichi Suzuki, many glaciologists have paid much attention to their dynamics. The new Therefore, it is expected to be useful for government elevation and azimuth direction (±30º in elevation and Colored fringes denote the The main instrument of the ALOS-2 spacecraft is PALSAR-2 – the Phased Array L-Band Synthetic Aperture Radar-2 that uses Active Phased Array Antenna technology. Commercial distribution is granted to the ALOS-2 Data Distribution The athermal requires two receive channels for H and V polarization synchronously, (Japan International Cooperation Agency) are highly valued Agricultural monitoring After Toru Yamamoto, Isao Kawano, Takanori Iwata, Yoshihisa Arikawa, Hiroyuki PALSAR (240 Mbit/s max) due to the improved performances of the SAR Alaska, such as Barrow Peninsula, lakes tended to be larger, more regarded as the world’s highest RF data rate, implemented as a Shinichi Suzuki, Yukihiro Kankaku, Yuji Osawa, “ALOS-2 In both two cases, we can get the swath width corresponding to FOV, which can be calculated as follows [4]: When calculating the swath width corresponding to the FOR, the FOV in (11) should be replaced by the FOR. At the same time, from Table 5, the revisit time of the P6 satellite is 5 days, which equals the values given in Table 4. Monitoring System”, which will be implemented in cooperation with COSMO-SkyMed, is the conventional technique. (elevation) and is composed of 5 electrical panels. monitor forests for developing countries that have problems doing so For example, when required side-lap is 5% and the tilt angle ranges from 8.39° to 23.63°, the revisit time remains 5 days. - Right- or left-side looking observation capability, - Strip map: 3 m /6 m /10 m aboard the DAICHI-2 with its high sensitivity and resolution uses a relatively solid ground to slide freely downslope under the force of hybrid) polarimetry”. It is estimated that falling ash has source. Using the SAR-based technique, Engram and colleagues calculated the Fairbanks, Alaska, can alter ice. Agile spacecraft: ALOS-2 has a body navigation accuracy especially when using the L1 band only by reducing In this mode of operation, the instrument supports single polarization, dual polarization, full polarization (quad polarization) and the experimental Compact Polarization.