Add VII interpolator.

[sjoro]

Add VII interpolator. A first prototype interpolation is provided and it's purpose is to navigate the simulated test data which most likely still has some things to be ironed out. The code may have to be revisited later on.

• Tests added
• Tests passed
• Passes git diff origin/master **/*py | flake8 --diff
• Fully documented

[coveralls]

Coverage remained the same at 0.0% when pulling 0607bd9 on sjoro:vii into 24552f0 on pytroll:master.

[sjoro]

Many lint errors come from the test_viiinterpolator.py

TEST_LON_2 = np.array(
    [[-12.        , -11.50003808, -11.        , -10.50011426,
       -9.        ,  -8.50026689,  -8.        ,  -7.50034342],
     [ -9.00824726,  -8.50989187,  -8.01100418,  -7.51272848,
       -6.01653996,  -5.51842688,  -5.01932226,  -4.52129225],
     [ -6.        ,  -5.50049716,  -5.        ,  -4.50057447,
       -3.        ,  -2.50073021,  -2.        ,  -1.50080874],
     [ -3.02492451,  -2.52706443,  -2.02774808,  -1.52997501,
       -0.03344942,   0.46414517,   0.96366893,   1.4611719 ],
     [  0.        ,   0.49903263,   1.        ,   1.49895241,
        3.        ,   3.49878988,   4.        ,   4.49870746],
     [  2.9578336 ,   3.45514812,   3.9548757 ,   4.4520932 ,
        5.94886832,   6.44588569,   6.94581415,   7.44272818]]
)

if white spaces are removed, readability is compromised.
what's the suggesed course of action here?

[mraspaud]

Either add # noqa at the end of each offending line, or remove the spaces.

[sjoro]

i removed the spaces.

[mraspaud]

Thanks for the nice work! This is just a first review, since I need more information on how the interpolation scheme goes to be able to review the algorithmic par of this.

Also, could you add a page in the documentation for this module ?

[sjoro]

Also, could you add a page in the documentation for this module ?

I have raised an issue on this. Link to the documentation should be added once publicly available.

[mraspaud]

Looks good, just one thing to fix!