Current and near-future SAR (and LIDAR) systems

Transcription

1 Current and near-future SAR (and LIDAR) systems Ake Rosenqvist solo Earth Observation, Japan Mexico City, Mexico June 7-9,

2 Current and near-future SARs & LIDARs ALOS-2/PALSAR-2 global mosaics SAOCOM-1A/1B BIOMASS GEDI SAOCOM Companion Satellite (ALOS Follow-on, NISAR ) Mexico City, Mexico June 7-9,

3 L-band SAR 25m global mosaics ( , 2015+) 3 ALOS & ALOS-2 mosaics available for public download at Mexico City, Mexico June 7-9,

4 ! Bulk download of data over 5 x 5 region (25 tiles 1 x1 each) OR! click on a tile on the grid to download the individual 1 tile Mexico City, Mexico June 7-9,

5 PALSAR 25 m global mosaic data RAW data format GEOTIF header information 4500x4500 pixels 16 bits (UINT) Backscatter (HH) Radar backscatter, normalised for incidence angle ( γ o = σ o /cosθ i ) Radiometric and geometric corr for topography Mexico City, Mexico June 7-9,

6 PALSAR 25 m global mosaic data GEOTIF header information RAW data format 4500x4500 pixels 16 bits (UINT) Backscatter (HV) Radar backscatter, normalised for incidence angle ( γ o = σ o /cosθ i ) Radiometric and geometric corr for topography Mexico City, Mexico June 7-9,

7 PALSAR 25 m global mosaic data Backscatter false-colour composite R: HH G: HV B: HH/HV Mexico City, Mexico June 7-9,

8 PALSAR 25 m global mosaic data Observation date DN=917 29/07/2008 DN=854 27/05/2008 DN=975 25/09/2008 Data layer showing the acquisition date for each pixel in the image: Date = 24/1/ DN RAW data format 4500x4500 pixels 16 bits (UINT) Mexico City, Mexico June 7-9,

9 PALSAR 25 m global mosaic data Incidence angle Layer with local incidence angle for each pixel RAW data format 8 bits 4500x4500 pixels Mexico City, Mexico June 7-9,

10 PALSAR 25 m global mosaic data Mask data Layer showing ocean and nodata areas: layover, shadow. RAW data format 8 bits 4500x4500 pixels Mexico City, Mexico June 7-9,

11 SAOCOM-1A/1B Mexico City, Mexico June 7-9,

12 SAOCOM-1A/1B Joint CONAE and ASI mission Launch ~2017 (1A) & 2018 (1B) L-band SAR (SP/DP/QP) 16-day recurrence cycle (8 days with 2 satellites) Duty cycle: ~15 min/orbit Integrated Mission Acquisition Strategy (IMAS): Dedicated national plan for Argentina Global Background Mission Data policy Global data from CONAE foreseen to be open and free ASI has exclusive data rights over Europe Mexico City, Mexico June 7-9,

13 SAOCOM-1A/1B CONAE objectives for the Global Background Mission (GBM): Thematic driver: Forest biomass and change Aim: Building consistent time-series archives over key global forest regions Geographical focus: Global tropical/sub-tropical zones Southern Hemisphere Siberia Mexico City, Mexico June 7-9,

14 SAOCOM-1A/1B Annual observations in Stripmap Dual-pol (10 2-look) mode (3 beams) Annual observations in TOPSAR Quad-pol (50 5-look) mode (2 beams) Central & S America SDP+TNQP Africa SDP+TNQP Mexico City, Mexico June 7-9,

15 SAOCOM-1A/1B Annual observations in Stripmap Dual-pol (10 2-look) mode (3 beams) Annual observations in TOPSAR Quad-pol (50 5-look) mode (2 beams) SE-Asia & Oceania SDP+TNQP South Asia TNQP + SDP Mexico City, Mexico June 7-9,

16 SAOCOM-1A/1B Annual observations in Stripmap Dual-pol (10 2-look) mode (3 beams) Annual observations in TOPSAR Quad-pol (50 5-look) mode (2 beams) Australia TNQP + SDP Siberia TNQP + SDP Mexico City, Mexico June 7-9,

17 SAOCOM-1A/1B Identical GBM plans for SAOCOM-1A and SAOCOM-1B during Epoch 2 yield: Stripmap Dual-pol InSAR coverage (8-day baseline) over all GBM regions on annual basis Full GBM scenario: "Sampled" 8-day Pol-InSAR coverage over all GBM regions on annual basis (TNQP mode InSAR available "on opportunity" only) Automatic gap filling Note: Timing of acquitions driven by SDP InSAR targeted to period of minimum precipitation (as far as possible). In Siberia mid-winter Polarimetric observations ~6 months later. Mexico City, Mexico June 7-9,

18 BIOMASS Mexico City, Mexico June 7-9,

19 BIOMASS P-band SAR (70 cm wavelength) ESA mission Launch (around) year lifetime GSD 50 m Complex obserbation strategy tuned specifically for tomography Mexico City, Mexico June 7-9,

20 BIOMASS Mexico City, Mexico June 7-9,

21 GEDI Mexico City, Mexico June 7-9,

22 GEDI Global Ecosystem Dynamics Investigation LIDAR NASA mission Launch (around) 2019 LIDAR mounted on the International Space Station (ISS) Objective: Use LIDAR to provide global, high-resolution observations of forest vertical structure. Core science questions: What is the aboveground carbon balance of the land surface? What role will the land surface play in mitigating atmospheric CO2 in the coming decades? How does ecosystem structure affect habitat quality and biodiversity? Mexico City, Mexico June 7-9,