1. Status Graz, 24/25 Oct 2013 MUPUS Team Meeting

2. 2 LOWG#12, DLR Cologne 18-20th of November 2008 PEN inflight calibration 4  14 inflight calibration points between -107°C and -91°C  3 PEN sensors (No 2,7,10) showed jump (< 0.5 K) in R-T characteristic after THC power calibration in PC#12  No changes between PC#12 and PC#13 => correction possible  No active heating before FSS !

3. 3 LOWG#12, DLR Cologne 18-20th of November 2008 MUPUS PEN Inflight Calibration 5  R0(-100°C) and TCR(-100°C) from 16 inflight calibration points between -107°C and -91°C  Corresponds to TCR ~ 0.0022 when evaluated with standard T0=0°C

4. 4 LOWG#12, DLR Cologne 18-20th of November 2008 (prelimenary) PEN uncertainty budget  Uncertainty(@T=-200°C, k=2) = 3.2 K  uncertainties of reference resistors R100, R20  uncertainty of h/k-2 Pt-100 (Class B, incl. line resistance correction ~ 1K / 3 1/2 )  Precision(@T=-200°C, k=2) = 2.6 K  Uncertainty due to linear extrapolation  Uncertainty due to neglection of quadratic term (2-3 10 -7 K -2, FS measurement)  Uncertainty due to imperfect wire correction (assumed 20% of nominal R w )  Uncertainty due to assumption of homogeneous PEN temperature (assumed 0.5 K / 3 1/2 )  Uncertainty due to electronics nonlinearity (FS, 0.25 K / 3 1/2 )  Uncertainty due to electronics noise (0.016 K, FM cruise checkouts) 1-Sigma

5. 5 LOWG#12, DLR Cologne 18-20th of November 2008 TM inflight calibration 2 6-25 µ 13-15 µ TM sensors lost sensitivity (but stable during cruise)!

6. 6 LOWG#12, DLR Cologne 18-20th of November 2008 TM inflight calibration 4 6-25 µm13-15 µm Extrapolation to TV test conditions: S/S 0 ~ 0.72 (6-25 µm) S/S 0 ~ 0.86 (13-15 µm)

7. 7 LOWG#12, DLR Cologne 18-20th of November 2008 Depth Sensor FM FS  DS values stable since 2006 (no data earlier)  Slight dependence on balcony temperature (similar for FS)  Precision (Repeatibility, FS) ~ 75 DU (~ 3.5 mm)

8. 8 LOWG#12, DLR Cologne 18-20th of November 2008 ANC-M (accelerometer) FM FS  ANC-M Offsets stable since PC#4 (Nov 2006)  Slight dependence on board (EBox) temperature ~ -1 mV/K  Noise stable at 0.6-0.7 mV

9. 9 LOWG#12, DLR Cologne 18-20th of November 2008 MUPUS FM Status Summary  All MUPUS hardware fully operational when entering hibernation  ComDPU working only at ½ nominal speed (known since 2006)  No indications for h/w changes during cruise with one exception:  3 PENEL sensors showed jump in R 0 (~0.5-1 K) after (very low power) THC heating  Calibration problems exist:  PENEL: extrapolation due to short baseline of inflight calibration points  TM: significant sensitivity loss already pre-launch

10. 10 LOWG#12, DLR Cologne 18-20th of November 2008 MUPUS RM Status  EQM DPU killed in Nov 2012  Stupid handling error by the project manager !  Replaced by last FM-series (reserve) DPU stored at DLR  RM functional  BUT: new PENEL-FS problem  Occured after insertion tests with SESAME at Philae GRM  Strange: everything ok during all functional tests including the last one before switch-off  No valid measurements anymore when red tag jointer connecting PENEL electrical to structural GND close  Everything ok when red tag jointer open !

11. 11 LOWG#12, DLR Cologne 18-20th of November 2008 Additional slides

12. 12 LOWG#12, DLR Cologne 18-20th of November 2008 MUPUS PEN Inflight Calibration 1  Inflight calibration needed to cover low T expected for the comet  Method:  Use Pt-100 in the holder as reference  Assume that PEN tube and holder at the same temperature in equilibrium (before PENEL switched on, justified by TV test with PEN FS)  Interpolate resistance backward in time to start of PENEL preheating (equilibrium)  => R i =R i (T ref ), i=1,2,…,16 PEN1 PEN16 TCU-MUPUS-DD Pt-100 PENEL, T=-50°C

13. 13 LOWG#12, DLR Cologne 18-20th of November 2008 MUPUS PEN Inflight Calibration 3 Backward Extrapolation Calibration (holder) Pt-100 Nearly linear increase of R during first 30 min.  Backward extrapolation gives reasonable R(T) point ! (random) uncertainty estimate ~ 0.5 K (neglecting deviations from homogeneity assumption) + systematic uncertainty of T holder ~ 0.8 K PENEL heat wave

14. 14 LOWG#12, DLR Cologne 18-20th of November 2008 MUPUS TM Calibration 1 Thermopile principle: T-differences between sensor and object => U th T Sens must be measured separately ! Object radiation Housing radiation Blackbody radiation