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ILRS Fall Workshop 2005 – Eastbourne, UK 1 MOBLAS 7 Timer Test ILRS Fall Workshop 2005 – Eastbourne, UK Howard Donovan NASA SLR HTSI
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ILRS Fall Workshop 2005 – Eastbourne, UK 1
MOBLAS 7 Timer Test
ILRS Fall Workshop 2005 – Eastbourne, UK
Howard DonovanNASA SLRHTSI
ILRS Fall Workshop 2005 – Eastbourne, UK 2
Test Parameters
• Aluminum Bar ~8 feet in length
• Bar fixed to Calibration Pier and Aligned with Beam Path
• Retro placed on Bar and moved 6 inches each data set
• Standard Calibration Test of ~1000 Returns (~5 minutes)
• Maintained Receive Energy from Data Set to Data Set
• No Changes to Telescope Pointing
ILRS Fall Workshop 2005 – Eastbourne, UK 3
Calibration Pier C
ILRS Fall Workshop 2005 – Eastbourne, UK 4
M7 & T4 Simultaneous Stability TestsTLRS-4 Stability Test August 26, 2005 @ 09:13 GMT
17.45
17.5
17.55
17.6
17.65
9:07:12 9:14:24 9:21:36 9:28:48 9:36:00 9:43:12 9:50:24 9:57:36 10:04:48 10:12:00 10:19:12
Sys
Del
ay (
ns)
System Delay (ns)
Avg. RMS = 5.61 mm Peak -to- Peak External Temperature Variation = 0.60 c
Peak -to- Peak System Delay Variation Target C= 3.30 mm
Moblas-7 Stability Test August 26, 2005 @ 09:13 GMT
97.3
97.35
97.4
97.45
97.5
9:07:12 9:14:24 9:21:36 9:28:48 9:36:00 9:43:12 9:50:24 9:57:36 10:04:48 10:12:00 10:19:12
Sys
Del
ay (
ns)
System Delay (ns)
Avg. RMS = 4.78 mm Peak -to- Peak External Temperature Variation = 0.55c
Peak -to- Peak System Delay Variation Target C= 1.50 mm
TLRS-4 Closeout Stability Test Sept 26, 2005 @ 07:02 GMT
17.45
17.5
17.55
17.6
17.65
6:57:36 7:04:48 7:12:00 7:19:12 7:26:24 7:33:36 7:40:48 7:48:00 7:55:12 8:02:24
Sys
Del
ay (
ns)
System Delay (ns)
Avg. RMS = 5.46 mm Peak -to- Peak External Temperature Variation = 0.60 c
Peak -to- Peak System Delay Variation Target C= 1.80 mm
Moblas-7 Closeout Stability Test Sept 8, 2005 @ 07:02 GMT
97.3
97.35
97.4
97.45
97.5
6:57:36 7:04:48 7:12:00 7:19:12 7:26:24 7:33:36 7:40:48 7:48:00 7:55:12 8:02:24
Sys
Del
ay (
ns)
System Delay (ns)
Avg. RMS = 4.63 mm Peak -to- Peak External Temperature Variation = 0.46c
Peak -to- Peak System Delay Variation Target C= 1.95 mm
ILRS Fall Workshop 2005 – Eastbourne, UK 5
MOBLAS 7 Range Residual vs Target Range
-50
-40
-30
-20
-10
0
10
20
30
40
50
0.00 0.50 1.00 1.50 2.00 2.50
Target Range Change (m)
On
e W
ay
Ra
ng
e R
es
idu
al (
mm
)
MOBLAS 7 Timer Test
ILRS Fall Workshop 2005 – Eastbourne, UK 6
TLRS 4 Stability TestTLRS-4 Stability Test Jun 1, 2005 @22:26 GMT
15.15
15.2
15.25
15.3
15.35
22:19:12 22:26:24 22:33:36 22:40:48 22:48:00 22:55:12 23:02:24 23:09:36 23:16:48 23:24:00 23:31:12
Sys
Del
ay (
ns)
System Delay (ns)
Peak -to- Peak System Delay Variation Target C= 5.1mm
Peak -to- Peak external Temperature Variation = 2.15cAvg. RMS = 5.4mm
TLRS-4 Stability Test July 12, 2005 @ 00:47 GMT
17.45
17.5
17.55
17.6
17.65
0:40:19 0:47:31 0:54:43 1:01:55 1:09:07 1:16:19 1:23:31 1:30:43 1:37:55 1:45:07 1:52:19
Sys
Del
ay (
ns)
System Delay (ns)
Avg. RMS = 5.14 mm Peak -to- Peak external Temperature Variation = 1.8 c
Peak -to- Peak System Delay Variation Target C= 1.8 mm
After Installation of Low-Loss Receive Cable (System Delay Change)
