diff --git a/ChangeLog b/ChangeLog
index 378107fc354cbfe454e5b69b481fd4ab3ca20ad6..0cdcd51707343ca44460b86e5a9f4b97344c9943 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,13 @@
+2013-03-08  Stefan Buehler  <sbuehler(at)ltu.se>
+
+	* ARTS-XML-DATA-2-1-46
+
+	* spectroscopy/cia/hitran2011/hitran_cia2012_adapted.xml.gz:
+	Added. This are the cleaned-up HITRAN CIA data in ARTS format.
+
+	* spectroscopy/cia/hitran2011/README_hitran_cia2012_adapted.txt:
+	Documentation for the above.
+
 2013-03-03 Jana Mendrok <jana.mendrok@ltu.se>
 
 	* ARTS-XML-DATA-2-1-45
diff --git a/spectroscopy/cia/hitran2011/README_hitran_cia2012_adapted.txt b/spectroscopy/cia/hitran2011/README_hitran_cia2012_adapted.txt
new file mode 100644
index 0000000000000000000000000000000000000000..05caea2fd06285fe469066c2320473d8313da198
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+++ b/spectroscopy/cia/hitran2011/README_hitran_cia2012_adapted.txt
@@ -0,0 +1,58 @@
+File "hitran_cia2012_adapted.xml.gz" contains HITRAN 2011 CIA data
+adapted for ARTS calculations.
+
+Besides the conversion to ARTS XML format, some changes have
+been made. See below for list of changes and comments.
+
+"N2-CIA-N2-0":   Rototranslational band.
+"N2-CIA-N2-1":   Fundamental band. For this, two different HITRAN datasets have been fused.
+"N2-CIA-H2-0":   
+"N2-CIA-CH4-0":   
+"H2-CIA-H2-0":   
+"H2-CIA-He-0":   
+"H2-CIA-CH4-0":   
+"H2-CIA-H-0":    Only for high temperatures (above 1000 K)
+"He-CIA-H-0":    Only for high temperatures (above 1500 K)
+"O2-CIA-O2-0":   Higher dataset numbers not included (they are in the UV/Vis).
+("O2-CIA-N2-0":  Not included! Only UV/Vis.)
+("O2-CIA-CO2-0": Not included! Only UV/Vis.)
+"CO2-CIA-CO2-0": Only up to 250 cm^-1. HITRAN themselves recommend caution.
+"CH4-CIA-CH4-0":   
+"CH4-CIA-Ar-0":
+
+Valid frequency and temperature ranges are as follows:
+
+- Print
+  CIA tag; Spectral range [cm-1]; Temp range [K]; # of sets
+  N2-CIA-N2-0; 0.02 - 554.00; 40.00 - 400.00; 10
+  N2-CIA-N2-1; 1850.00 - 3000.09; 228.20 - 362.50; 10
+  N2-CIA-H2-0; 0.02 - 1886.00; 40.00 - 400.00; 10
+  N2-CIA-CH4-0; 0.02 - 1379.00; 40.00 - 400.00; 10
+  H2-CIA-H2-0; 20.00 - 10000.00; 200.00 - 3000.00; 113
+  H2-CIA-He-0; 20.00 - 20000.00; 200.00 - 9900.00; 334
+  H2-CIA-CH4-0; 0.02 - 1946.00; 40.00 - 400.00; 10
+  H2-CIA-H-0; 100.00 - 10000.00; 1000.00 - 2500.00; 4
+  He-CIA-H-0; 50.00 - 11000.00; 1500.00 - 10000.00; 10
+  O2-CIA-O2-0; 1150.00 - 1950.00; 193.40 - 353.40; 15
+  CO2-CIA-CO2-0; 1.00 - 250.00; 200.00 - 800.00; 7
+  CH4-CIA-CH4-0; 0.02 - 990.00; 40.00 - 400.00; 10
+  CH4-CIA-Ar-0; 1.00 - 697.00; 70.00 - 296.00; 5
+
+
+Log of Changes:
+
+N2-N2: Merged the two high-frequency datasets.
+
+O2-O2: Kick out UV/Vis datasets
+
+CO2-CO2: This is only the self continuum of CO2. The CO2-air continuum
+	 has strong features above 250 cm^-1 that
+	 are present in CKD_MT but missing here.
+	 HITRAN data generally looks weird. It is only in the
+	 alternative folder, and in the paper they basically recommend
+	 not to use it. ==> No changes, but usage not recommended.
+
+O2-N2, O2-CO2: UV/Vis only, remove.
+
+Author: Stefan Buehler
+Date:   2013-02-13
diff --git a/spectroscopy/cia/hitran2011/hitran_cia2012_adapted.xml.gz b/spectroscopy/cia/hitran2011/hitran_cia2012_adapted.xml.gz
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