diff --git a/ChangeLog b/ChangeLog
index 7d407c40be5b20c056479600be28d6466195ebd5..116a8b1b011ab7b56c00645b6e317c247bfcd8f8 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,14 @@
+2015-06-17 Jana Mendrok <jana.mendrok@ltu.se>
+
+	* ARTS-XML-DATA-2-2-5
+
+	* scattering/README, planets/Venus/SAT/README, planets/Mars/SAT/README:
+	READMEs for folders missing them so far.
+
+	* spectroscopy/Perrin_artscat34/README, planets/Venus/MPS/README,
+	planets/Mars/MPS/README, planets/Earth/Fascod/README:
+	Minor corrections/updates.
+
 2015-06-17 Jana Mendrok <jana.mendrok@ltu.se>
 
 	* ARTS-XML-DATA-2-2-4
diff --git a/planets/Mars/MPS/README b/planets/Mars/MPS/README
index 4b1980aadcab80fae4d352fbf67a903c009853db..97e61597914064acea112a64846aa3a3cf338574 100644
--- a/planets/Mars/MPS/README
+++ b/planets/Mars/MPS/README
@@ -1,7 +1,7 @@
 This directory contains planet characterization data (atmospheric profiles,
 surface properties, and the like) for Mars
 
-Mars.meanRefIndex.n.xml
+Mars.surface_complex_refr_index_field.xml
 -----------------------
 - global field of surface refractive index
 - originating from dielectric constant data (real part only; hence imag. part
diff --git a/planets/Mars/SAT/README b/planets/Mars/SAT/README
new file mode 100644
index 0000000000000000000000000000000000000000..86073e1ad668ea89d36cc49f421d226c0c5a542c
--- /dev/null
+++ b/planets/Mars/SAT/README
@@ -0,0 +1,28 @@
+This directory contains cloud and dust data (single scattering properties and
+particle number density fields) for Mars
+
+Mars.Ls[0,90,180,270].[day,night].dust-[low,medium,high]/*.pnd_field__*.xml
+-----------------------
+- 1D number density fields for different cloud/dust types and cases
+- available for 4 seasons, day/night, and 3 dust loadings (corresponding to
+   atmospheric cases, except negligible dependence on solar activity; note that
+   atm case dependence only refers to different p-z-relation during
+   seasons/daytimes; it does so far NOT consider different cloud/dust conditions
+   in different seasons/daytimes)
+- data created by J. Mendrok (LTU) within ESA Planetary study
+- for more details see TechnicalNote3 of the ESA Planetary study
+
+Mars.scat_data__*.xml
+-----------------------
+- single scattering data for different cloud/dust types and cases
+- data created by J. Mendrok (LTU) within ESA Planetary study
+- for more details see TechnicalNote3 of the ESA Planetary study
+
+NOTE: single scattering data and number density fields form paired groups, which
+ are linked by cloud category (CO2ice or H2Oice or Dust) and bulk type (e.g.,
+ *-size-bulk). within the groups, one can choose different dielectric property
+ assumptions (RI-*) for the single scattering data and different altitude
+ distributions (e.g., *-mixed, *-profile) for the number density fields.
+See Consolidated Design Document of the ESA Planetary study for details on the
+ relation of single scattering and number density data and on the file name
+ layout.
diff --git a/planets/Venus/MPS/README b/planets/Venus/MPS/README
index f582f0b570c358ab6570b2e6eb238857cfddbfb7..31095deb903cbf48bbac5009fcdc05988d43c1c5 100644
--- a/planets/Venus/MPS/README
+++ b/planets/Venus/MPS/README
@@ -2,14 +2,14 @@ This directory contains planet characterization data (atmospheric profiles,
 surface properties, and the like) for Venus provided by MPS within ESA Planetary
 study. For more details see TechnicalNote2 of the ESA Planetary study.
 
-Venus.meanRefIndex.n.xml
+Venus.surface_complex_refr_index_field.xml
 ------------------------
 - global field of surface refractive index
 - originating from dielectric constant data (real part only; hence imag. part
 set to 0)
 - for more details see TechnicalNote2 of the ESA Planetary study
 
-Mars.t_surface.xml
+Venus.t_surface.xml
 -----------------------
 - global field of surface (=skin) temperature
 - single, mean condition field
@@ -31,7 +31,7 @@ For a couple of reasons finally selected data is taken from a number of differen
 
 - We need, however consistent, full-coverage (i.e., covering both the vmr and el.dens. regions) z and T data. This is available from the latest (ext*) data sets, hence we get z and T fields from those instead of merging them ourselves from the original data, where vmr/T and el.dens. come with their own z fields.
 
-- In the orginal el.dens. data, there are only 3 sets (day, night, night_cold) instead of the 5 scenarios (vira.day, vira.day_highlat, vira.night, spicav.night, spicav.night_cold) given, and assignment between the 3 and 5 cases is not claer. The latest (ext*) el.dens. data set contains data for all 5 scenarios (though originally sorted into day/ and night/ folders instead of into the 5 scenario folders) and seems to agree well with the T-fields for the different cases (assuming/indicating the el.dens.-over-z is not scenario dependend). Hence, we take the el.dens. fields from the ext* data.
+- In the orginal el.dens. data, there are only 3 sets (day, night, night_cold) instead of the 5 scenarios (vira.day, vira.day_highlat, vira.night, spicav.night, spicav.night_cold) given, and assignment between the 3 and 5 cases is not clear. The latest (ext*) el.dens. data set contains data for all 5 scenarios (though originally sorted into day/ and night/ folders instead of into the 5 scenario folders) and seems to agree well with the T-fields for the different cases (assuming/indicating the el.dens.-over-z is not scenario dependend). Hence, we take the el.dens. fields from the ext* data.
 
 
 In the following we document, which version (date) of the individual data is taken:
diff --git a/planets/Venus/SAT/README b/planets/Venus/SAT/README
new file mode 100644
index 0000000000000000000000000000000000000000..694eef7f9e0d69cdd9c34fd48502d65b7c04928f
--- /dev/null
+++ b/planets/Venus/SAT/README
@@ -0,0 +1,26 @@
+This directory contains cloud and haze data (single scattering properties and
+particle number density fields) for Venus
+
+Venus.[vira,spicav].[day,day_highlat,night,night_cold]/*.pnd_field__*.xml
+-----------------------
+- 1D number density fields for different cloud/haze layers, modes, and cases
+- available for 5 scenarios from different data sources (VIRA and SPICAV),
+  for 2 times of day (day,night). note that scenario dependence only refers to
+  different p-z-relation; it does so far NOT reflect possible different cloud
+  conditions, e.g., in different daytimes.
+- data created by J. Mendrok (LTU) within ESA Planetary study
+- for more details see TechnicalNote3 of the ESA Planetary study
+
+Venus.scat_data__*.xml
+-----------------------
+- single scattering data for different cloud/haze layers and modes
+- data created by J. Mendrok (LTU) within ESA Planetary study
+- for more details see TechnicalNote3 of the ESA Planetary study
+
+NOTE: single scattering data and number density fields form paired groups, which
+ are linked by cloud category (H2SO4) and bulk type (layer and mode, *-bulk).
+ within the groups, one can choose different altitude distributions (*-profile)
+ for the number density fields.
+See Consolidated Design Document of the ESA Planetary study for details on the
+ relation of single scattering and number density data and on the file name
+ layout.
diff --git a/scattering/README b/scattering/README
new file mode 100644
index 0000000000000000000000000000000000000000..8f35bdcb11bedcdfa18d83ed1cb30ddfdbecc8ec
--- /dev/null
+++ b/scattering/README
@@ -0,0 +1,34 @@
+This directory data related to running scattering calculations. Major part is
+single scattering data for different types of (well-defined) scattering particles.
+
+H2O_liquid/*.xml
+-----------------------
+- single scattering data (*.um.xml) and corresponding meta data (*um.meta.xml)
+- liquid water particles (e.g. for Earth liquid clouds and rain)
+- range of sizes (0.1-10,000um), all assumed as spheres
+- data created by ARTS developers using atmlab routines (Maetzler's matlab Mie code; dielectric property routines)
+- for more details data headers
+
+H2O_ice/*.xml
+-----------------------
+- single scattering data (*.um.xml) and corresponding meta data (*um.meta.xml)
+- water ice particles (e.g. for Earth ice clouds, hail, snow)
+- range of sizes (0.1-10,000um), all assumed as solid spheres
+- data created by ARTS developers using atmlab routines (Maetzler's matlab Mie code; dielectric property routines)
+- for more details data headers
+
+fosangles_360.xml
+-----------------------
+- set of directions/angles (polar and azimuth angles) for FOS calculations
+  (radiation path directions)
+- directions are equally distributed over the sphere, each representing a solid
+  angle of 4Pi/360 sr
+- data created by P. Eriksson (Chalmers)
+
+SingleScatteringFile_allH2Oice-allH2Oliquid.xml
+ScatteringMetaFile_allH2Oice-allH2Oliquid.xml
+-----------------------
+- list of scattering data and meta data files for use with
+  ScatteringParticleTypeAndMetaRead
+- covers all liquid water and water ice particles (all sizes) given in the
+  subfolders
diff --git a/spectroscopy/Perrin/README b/spectroscopy/Perrin/README
index cf493a307ecb08aeb565c590042623f4471b46f6..40ff59f81163c886db240f91601234009832c7f8 100644
--- a/spectroscopy/Perrin/README
+++ b/spectroscopy/Perrin/README
@@ -1,3 +1,11 @@
+This directory contains a spectroscopic line catalogue.
+
+- prepared as part of ESA ESA Planetary Toolbox study. For more information see
+  the ESA study's Technical Note 3.
+- specifically prepared for planetary radiative transfer
+- covers data for frequencies <3THz
+
+
 Species overview
 ================