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The marks for these exercises are also included in the module assessment . The suite of spaceborne SAR systems and programs currently envisioned by the international community provides an important framework for addressing key science issues and applications . Hindrances to use of SAR systems have included : ( 1 ) difficulty of understanding the information content of the complex phase and amplitude information recorded in multifrequency , polarimetric SAR data ; ( 2 ) the lack of available , calibrated data over sites of interest ; ( 3 ) the lack of accessible computer software to exploit the information present in the data ; and ( 4 ) certain characteristics of SAR data , including relief displacement and image speckle . A summary of sensors is included as an Appendix . When disturbed they rapidly run or fly away . Prediction of coastal currents via numerical models that are tuned and initialized by current measurements of all types ( especially including SAR ) is a capability that is highly desirable . Representative trade names may be included along with generic names . The spreader — as simple as a notched stick , but otherwise available in various forms at a well-stocked garden center — is wedged in between the branch and the trunk to create a wider angle . This module provides further opportunities for practice of the combined language and interpreting skills included in the two previous levels , through a series of dialogues centred mainly around business negotiation situations .