Change log

ECSS-E-ST-10-04A 21 January 2000	First issue
ECSS-E-ST-10-04B	Never issued
ECSS-E-ST-10-04C 15 November 2008	Second issue • General The whole document was re-written. The number of clauses and the space environment components addressed in the individual clauses were kept unchanged. The core of the document was newly structured into a main part, followed by normative and informative annexes. Descriptions, specifications of reference models and requirements, reference data and additional information are now clearly separated. Where possible, model uncertainties are given. • Main changes of standard models and requirements o Gravity The Joint Gravity Model 2 (JGM-2) for Earth was replaced by the EIGEN-GL04C gravity model. o Geomagnetic field The Internal Geomagnetic Field Model, IGRF-95, was replaced by IGRF-10. For the external field model no standard was defined previously. Now 2 options are given as standard: the model from Alexeev et al. from 2001 or the Tsyganenko model from 1996. o Natural electromagnetic radiation and indices The solar constant was updated to a value of 1 366,1 Wm^-2 at 1 AU. New indices S10.7, M10.7 and IG12 were introduced. Reference values for the indices were changed or newly provided. Reference values for short term variations of ap are newly provided. o Neutral atmosphere The standard model MSISE-90 was replaced by 2 different models: NRLMSISE-00 for temperatures and composition and JB-2006 for total atmospheric densities. A standard model for the Martian atmosphere was introduced. o Plasmas The International Reference Ionosphere model IRI 1995 was replaced by IRI 2007. For the plasma sphere of Earth the model from Carpenter and Anderson was replaced by the Global Core Plasma Model (GCPM). o Energetic particle radiation For trapped radiation the AE8 and AP8 models remain the standard with 2 newly introduced exceptions: new standards for electron fluxes near GEO and near GPS orbits are the IGE-2006 and the ONERA MEOv2 models, respectively. The new standard for solar event proton fluences is the ESP model (replacing JPL-91). CREME96, which was the standard model for solar particle event ions and Galactic Cosmic Rays (GCR), is now the standard for solar particle peak fluxes only. For GCR ISO 15390 is the new standard. The FLUMIC model is introduced as worst case for trapped electrons for internal charging analyses. A standard radiation model for Jupiter was introduced. o Space debris and meteoroids MASTER 2005 is the new standard model for Space Debris (previously no standard space debris model was defined). A new standard velocity distribution (HRMP) for the meteoroid model from Grün et al. was specified. The material density for meteoroids was changed from 2,0 g/cm^3to 2,5 g/cm^3. For meteoroid stream fluxes the model from Cour-Palais was replaced by the model from Jenniskens and McBride. o Contamination Clear top level requirements for contamination assessments were introduced. The description of analysis methods and tools was streamlined and reduced.