SKIMsimulator Coded in python 3, tested with python 2.7 and 3.5 can - - PowerPoint PPT Presentation

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SKIMsimulator Coded in python 3, tested with python 2.7 and 3.5 can - - PowerPoint PPT Presentation

Dec 09, 2022 320 likes •456 views

SKIMsimulator Coded in python 3, tested with python 2.7 and 3.5 can be downloaded from oceandatalab gitlab Output: - grids - radial velocity interpolated from model Input: - velocity - instrument noise SKIM simulator from any model - stoke

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SLIDE 1

SKIMsimulator

Simulator is configurable with a parameter file, the following parameters can be tested:

  • orbit
  • rotation speed: from 2.5 to 3.4 tr/min
  • order, position and number of beams: from 6 to 8 beam
  • instrumental noise: function of the radial angle and the beam angle (6 or 12)
  • Stoke parameter: G,
  • Bias parameters: perc_error, area to compute std(uss), errdcos if constant

wb = G * perc_error * std(uss) * errdcos Nadir Simulator is build to be flexible to add and improve the error budget Input:

  • velocity
  • stoke drift
  • coordinates

from any model

SKIM simulator

Output:

  • grids
  • radial velocity interpolated from model
  • instrument noise
  • Stoke biais
  • radial stoke drift
  • radial velocity with total noise
  • nadir noise

Coded in python 3, tested with python 2.7 and 3.5 can be downloaded from oceandatalab gitlab

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SLIDE 2

SKIM-like data has been produced for the following region:

  • Aghulas
  • Gulf Stream
  • Oregon
  • FRAM
  • Equator
  • North Atlantic (with a white noise)

SKIMsimulator outputs

2016

  • 1 beams at 6º (0 and 180)
  • 4 beams at 12º (0, 90, 180, 270)
  • w = 2.5 tr/min

2017v2

  • 2 beams at 6º (0 and 180)
  • 5 beams at 12º (0, 77,
  • w = 3.4 tr/min

With two configurations

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SLIDE 3

Grids Gulf stream

(S1a orbit, nadir, configuration 2016 and 2017v2)

2016 2017v2

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SLIDE 4

FRAM Equator Agulhas Oregon Grids other region

(S1a orbit, nadir, configuration 2017v2)

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SLIDE 5

FRAM Equator Agulhas Oregon Grids other region

(S1a orbit, nadir, configuration 2017v2)

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SLIDE 6

errdcos other region

(S1a orbit, nadir, configuration 2017v2)

FRAM Equator Agulhas Oregon

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SLIDE 7

FRAM Equator Agulhas Oregon SKIM simulated velocity

(configuration 2017v2)

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SLIDE 8

SKIM simulated velocity

Region Configuration Total error Std 6º Total error Std 12º Agulhas 2017v2 24 cm/s 23 cm/s Oregon 2017v2 19 cm/s 15 cm/s Equator 2017v2 15 cm/s 11 cm/s Fram 2017v2 22 cm/s 20 cm/s Gulf Stream 2017v2 20 cm/s 14 cm/s Gulf Stream 2016 25 cm/s 20 cm/s

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SLIDE 9

SKIM simulated velocity

(configuration 2017v2, current from natl60 model, stoke drift from ww3) radial velocity without noise

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SLIDE 10

SKIM simulated velocity

(configuration 2017v2, current from natl60 model, stoke drift from ww3) radial velocity with noise

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SLIDE 11

SKIM simulated velocity

(configuration 2017v2, current from natl60 model, stoke drift from ww3) radial velocity green: model, red: radial velocity without noise, yellow: radial velocity with noise

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SLIDE 12

SKIM simulated velocity

(configuration 2017v2, current from natl60 model, stoke drift from ww3) radial velocity green: model, red: radial velocity without noise, yellow: radial velocity with noise