2/10/2018

n/a

14% DI (CT7, 624 nm)

83.4 % (624 nm)

n/a

                20181002_WHTM3_Wash.pdf

Water wash improved 3 Red bands only

30/04/2018

n/a

22% DI (CT7, 624 nm)

79.7 % (624 nm)

n/a

                20180430_WHTM3_check.pdf

29/09/2017

n/a

15% Dust scattering 
(CT7, 624 nm)

81.8%

n/a

                20170929_WHTM3_check.pdf

03/03/2016

6.8 ± 0.3 E-03

1.0 ± 0.1 E-03

0.836 ± 0.004

78.3

                20160303_M3_Wash.pdf

Washed 2 weeks after low readings (82% avg) and realuminization cancelled. Central damaged spot remains. 
Now 87% (CT7 avg), shortfall from fresh aluminium ~4%, or almost 2% lower than M1.

16/03/2015

8.3E-02

1.7E-03

0.829

76.1

                20150316_WHTM3_CO2.pdf

CO2 cleaning. Improvement in Reflectivity 2%

10/07/2014

4.2E-03

1.5E-03

0.832

48.7

20140710_WHTM3_CO2water.pdf

Some rain stains remain after CO2 and water cleaning. 
Final average CT7 88.7% R

22/03/2013

1.52E-02

2.74E-03

0.860

24.9

20130322_M3_Alum.pdf

Measured straight after opening Alum. tank 
& again 3 weeks later, on WHT.

17/12/2012

1.4E-02

2.1E-03

0.811 
± 0.004

109

20121217_WHTM3_Wash.pdf

Final values - no improvement obtained. 
The alcohol cleaning has not 
given a good result.

07/07/2011

1.52E-02

2.74E-03

0.827

108.4

20110707_WHTm3_clean.pdf

after cleaning with air, 
then alcohol+drag technique

01/07/2011

2.57E-02

6.35E-03

0.787

131.8

20110707_WHTm3_clean.pdf

before cleaning

07/04/2009

1.208E-02

5.469E-03

0.778

83.917

20090407WHTter.pdf

02/08/2006

11:03:24

1.23E-02

1.99E-03

0.8284

100.600

WHTNA308.PRN

After CO2 Cleaning

02/08/2006

10:04:59

1.24E-02

3.16E-03

0.8293

89.525

WHTNB308.PRN

Before CO2 Cleaning

04/05/2006

11:12:03

1.14E-02

1.76E-03

0.8208

99.525

WHTNA405.PRN

After washing

04/05/2006

10:48:18

2.18E-02

4.05E-03

0.8025

130.775

WHTNB405.PRN

Before washing

27/04/2006

13:54:20

2.15E-02

4.57E-03

0.7948

125.017

WHTNA274.PRN

After CO2 Cleaning

27/04/2006

08:07:56

2.36E-02

6.04E-03

0.7950

125.260

WHTNB274.PRN

Before CO2 Cleaning

07/03/2006

13:47:21

2.23E-02

5.37E-03

0.8163

121.425

WHTNA703.PRN

07/03/2006

09:35:43

2.85E-02

1.02E-02

0.7916

130.720

WHTNB703.PRN

25/01/2006

13:17:46

3.05E-02

1.05E-02

0.7843

136.300

WHTN251.PRN

16/09/2005

CO2 Cleaned 16/09/2005 

no reflectivity data

11/08/2005

CO2 Cleaned 11/08/2005 

no reflectivity data

28/06/2005

CO2 Cleaned 28/06/2005 

no reflectivity data

10/03/2005

13:32:26

1.32E-02

2.39E-03

0.8302

101.440

WHTNA103.PRN

After CO2 Cleaning

10/03/2005

10:41:45

1.86E-02

6.56E-03

0.8033

108.614

WHTNB103.PRN

Before CO2 Cleaning

27/07/2004

08:21:29

1.12E-02

4.80E-03

0.8459

77.886

WHTNB277.PRN

Before CO2 Cleaning

15/06/2004

12:42:57

1.00E-02

1.98E-03

0.8521

81.971

WHTNA156.PRN

After CO2 Cleaning

15/06/2004

10:21:20

1.12E-02

4.37E-03

0.8288

79.650

WHTNB156.PRN

Before CO2 Cleaning

26/04/2004

10:49:47

9.63E-03

2.74E-03

0.8371

77.457

WHTNA264.PRN

After CO2 Cleaning

26/04/2004

09:14:08

1.07E-02

3.44E-03

0.8153

79.950

WHTNB264.PRN

Before CO2 Cleaning

11/02/2004

14:23:45

7.13E-03

1.27E-03

0.8256

74.188

WHTNA112.PRN

After CO2 Cleaning

11/02/2004

10:29:22

9.25E-03

3.56E-03

0.8096

73.043

WHTNB112.PRN

Before CO2 Cleaning

15/01/2004

05:32:21

8.00E-03

2.23E-03

0.8678

68.810

WHTN1501.PRN

15/01/2004

05:32:21

8.00E-03

2.23E-03

0.8678

68.810

WHTN1501.PRN

27/11/2003

08:41:55

6.22E-03

1.28E-03

0.8733

64.700

WHTNA27N.PRN

After CO2 Cleaning

27/11/2003

03:03:43

1.30E-02

6.39E-03

0.8254

84.300

WHTNB27N.PRN

Before CO2 Cleaning

09/09/2003

01:28:23

7.90E-03

3.49E-03

0.8605

64.991

WHTN909.PRN

20/08/2003

01:50:13

7.57E-03

3.05E-03

0.8384

64.656

WHTN208.PRN

25/07/2003

Cleaned 25/07/2003 

no reflectivity data

13/06/2003

Cleaned 13/06/2003 

no reflectivity data

08/05/2003

Cleaned 08/05/2003

no reflectivity data

28/03/2003

11:48:36

5.03E-03

1.68E-03

0.8721

55.089

WHTN2803.PRN

17/01/2003

12:18:08

3.36E-03

4.03E-04

0.8763

51.029

WHTNA171.PRN

After CO2 Cleaning

17/01/2003

11:14:17

3.99E-03

1.17E-03

0.8656

48.186

WHTNB171.PRN

Before CO2 Cleaning

03/01/2003

12:00:03

3.31E-03

8.89E-04

0.8514

45.050

WHTN0301.PRN

16/12/2002

14:16:49

2.87E-03

3.53E-04

0.8662

54.980

WHTNA16D.PRN

After CO2 Cleaning

16/12/2002

13:58:17

2.78E-02

3.49E-03

0.8020

172.478

WHTNB16D.PRN

Before CO2 Cleaning

25/09/2002

10:39:11

6.95E-03

1.21E-03

0.8624

72.510

WHTNA259.PRN

After CO2 Cleaning

25/09/2002

08:19:33

9.20E-03

3.11E-03

0.8546

72.538

WHTNB259.PRN

Before CO2 Cleaning

13/09/2002

08:56:59

7.78E-03

2.28E-03

0.8696

66.900

WHTN1309.PRN

16/08/2002

12:15:49

6.37E-03

1.25E-03

0.8678

66.400

WHTNA168.PRN

After CO2 Cleaning

16/08/2002

08:26:27

8.06E-03

2.59E-03

0.8249

69.144

WHTNB168.PRN

Before CO2 Cleaning

12/07/2002

09:06:40

8.06E-03

1.86E-03

0.8830

71.583

WHTNA127.PRN

After CO2 Cleaning

08/07/2002

09:35:58

8.09E-03

2.55E-03

0.8394

69.338

WHTN807.PRN

31/05/2002

09:11:55

5.44E-03

1.14E-03

0.8348

61.522

WHTNA315.PRN

31/05/2002

08:16:18

8.15E-03

2.74E-03

0.8533

68.055

WHTNB315.PRN

16/04/2002

08:44:48

6.88E-03

1.25E-03

0.8336

72.130

WHTN1604.PRN

26/03/2002

11:10:38

6.76E-03

1.32E-03

0.8460

71.089

WHTNA263.PRN

26/03/2002

09:24:19

1.01E-02

4.18E-03

0.8662

73.489

WHTNB263.PRN

07/01/2002

11:24:36

5.48E-03

1.21E-03

0.8475

60.827

WHTNA701.PRN

07/01/2002

09:32:24

1.16E-02

5.33E-03

0.7976

81.460

WHTNB701.PRN

04/12/2001

10:06:47

1.08E-02

5.02E-03

0.8116

78.011

WHTN412.PRN

05/11/2001

09:54:35

1.08E-02

5.73E-03

0.7940

78.190

WHTN511.PRN

05/09/2001

08:53:56

7.42E-03

4.99E-03

0.8704

61.170

WHTNB509.PRN

18/07/2001

09:28:01

3.38E-03

2.12E-03

0.8663

41.575

WHTN1807.PRN

05/06/2001

09:23:55

2.36E-03

1.36E-03

0.8664

34.850

WHTN506.PRN

04/04/2001

13:55:47

2.57E-03

1.34E-03

0.8727

34.420

WHTNACO2.PRN

03/04/2001

08:55:35

4.29E-03

3.47E-03

0.8922

45.644

WHTNBCO2.PRN

30/01/2001

14:00:46

8.81E-04

6.09E-04

0.8956

20.789

WHTN3001.PRN

21/12/2000

12:11:52

3.77E-04

4.59E-05

0.7880

20.155

WHTN2112.PRN

30/11/2000

14:37:54

3.35E-03

1.31E-03

0.8840

38.900

NAS3011.PRN

18/09/2000

09:47:09

1.80E-02

6.33E-03

0.8298

101.600

NAS1809.PRN

17/09/2000

06:56:04

5.51E-02

4.52E-02

0.2250

137.500

NAS1709.PRN

25/05/2000

10:39:45

1.20E-02

2.05E-03

0.8448

96.275

NASAFTER.PRN

24/05/2000

13:37:23

3.41E-02

1.52E-02

0.7516

143.800

NASBEFOR.PRN