To facilitate the intercomparison of the submitted result files, the RAMI file-naming and formatting conventions outlined on this webpage must be adhered to.
In RAMI V each individual experiment <EXP> is defined as the combination of the structural description of the scene (which will be summarised using three fields in the output filename: <SCENE>_<TAG1>_<TAG2>), its spectral properties ( _<BAND> ), the illumination geometry ( _<ILLUMINATION> ), and the measurements ( -<meas> ) to be performed (note the dash "–" is used here as separator instead of the underscore "_" ).
Each participant is asked to mark his/her submitted file with the _<model> tag, for identification purposes.
Then the submitted filenames should assume the following form:
<EXP>_<model>.mes
or, more explicitly:
<TESTCASE>-<meas>_<model>.mes
<SCENE>_<TAG1>_<TAG2>_<BAND>_<ILLUMINATION>-<meas>_<model>.mes
We have kept the concept of <TESTCASE> to uniquely identify the virtual environment, including its structural description, spectral properties and illumination geometry, in which the measurement is performed. In other words, for a unique scene (<SCENE>_<TAG1>_<TAG2>), the different spectral properties and illumination geometries, define different testcases.
<TESTCASE> fields are in capitals, wheras <meas> and <model> are in lowercase.
An example of the <TESTCASE>-<meas>_<model>.mes filenaming scheme is "HET01_DIS_UNI_O17_z50a000-brfop_raytran.mes", where:
All tags should be defined in the submitted filenames.
The identifier UND should be used where a value is undefined. <model> length should be composed of a maximum of 10 characters (including [a-b][0-9] - ). A summary of all allowed measurement and test-case identifiers is presented in the tables below:
List of the thirty eight RAMI-5 scenes, 0-29 are the thirty Abstract scenes, 30-37 the eight Actual canopies.
In Rami-V the spectral bands are selected in order to mimic a selection of similar bands from the European Copernicus optical missions Sentinel-3 Ocean and Land Colour Instrument (OLCI), Sentinel-2 Multi-Spectral Instrument (MSI) and the NASA Moderate Resolution Spectroradiometer (MODIS). Table 1 shows the correspondence of several bands and the selections made for RAMI-V are highlighted in the last column. OLCI bands are labelled as Oxx, MSI bands as Mxx and MODIS bands as MDx. They should be used to complete the experiment name as described in the naming conventions page.
Table 1: The RAMI-V band selection criteria based on the equivalence/complementariety of OLCI, MSI and MODIS spectral bands.
To calculate the spectral properties for each band we performed the convolution of the extraterrestrial solar spectrum $S_{0\lambda}$ with the spectral response of the sensor $R(\lambda)$ and the reflectance spectrum of soil, leaf or trunks $\rho(\lambda)$, accordingly to the equation
$$X= \frac {\int_0^\infty S_{0\lambda} R(\lambda) \rho(\lambda) d\lambda}{\int_0^\infty S_{0\lambda} R(\lambda) d\lambda},$$ and provided in specific files for each scene.
The RT model identifier tag is the 'name' of the model that was used to perform the RT simulations contained within the measurement results file. RT models names should be one single string containing only alphanumeric characters. The names of the RT model that participated in the RAMI activity so far can be found in the appropriate pages of the individual RAMI phases. RT models that remain unchanged between successive RAMI phases keep their <MOD> identifier tags; models that have been upgraded or modified from a previously participating version obtain a numerical ending, e.g., sprint in phase 1 became sprint2 in phase 2 of the RAMI initiative.
