for the 2009 Operation of SCINDA Receiver at the University ...in July 2008. During the period July...
Transcript of for the 2009 Operation of SCINDA Receiver at the University ...in July 2008. During the period July...
Annual Report for the period July 2008‐July 2009
Operation of SCINDA Receiver at the University of Calcutta
Principal Investigator: Prof. Ashish Kumar DasGupta
Institute of Radio Physics and Electronics
University of Calcutta
92 Acharya Prafulla Chandra Road
Kolkata 700009
India
The SCINDA receiver has been operational at the Institute of Radio Physics and
Electronics, University of Calcutta, Calcutta, India since November 2006. A proposal for
procuring a dedicated broadband internet connection for uploading the SCINDA data and its
archival, and on‐line power backup was submitted to the Asian Office of Aerospace Research
and Development (AOARD), Japan in May 2008. A one‐time grant of US$6900.00 was received
in July 2008. During the period July 2008 through July 2009, operation of the SCINDA receiver
has been almost uninterrupted except during the total solar eclipse of July 22, 2009. A
dedicated broadband internet connection is operational from the government‐run Bharat
Sanchar Nigam Limited (BSNL) since October 2008. An on‐line UPS has been procured to
prevent data loss due to disruption of power.
Data from the SCINDA receiver is available to the Satellite Beacon Group of this Institute
in the post‐processed form. It has been utilized for studying some Space Weather events
occurring on February 2, 2008 and September 25, 2008 when post‐sunset scintillations were
observed on GPS links from Calcutta (22.58°N, 88.38°E geographic; magnetic dip: 32°N). The
SCINDA GPS S4 and elevation angle plot of September25, 2008 showed fluctuations on the
SV12 link around 21:30 LT. Figure 1 shows the GPS S4 and elevation angle plot corresponding to
September 25, 2008. The shaded portion of the figure corresponds to the local post sunset
hours. The SCINDA polar plot for the same evening showed the location of SV12 to be almost
due south of Calcutta as evident from Figure 2. A software‐based dual frequency high
resolution GPS receiver is available with this group which has the capability of measuring TEC
Report Documentation Page Form ApprovedOMB No. 0704-0188
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1. REPORT DATE 13 NOV 2009
2. REPORT TYPE Final
3. DATES COVERED 25-06-2008 to 23-09-2009
4. TITLE AND SUBTITLE Operation of SCINDA Receiver at the University of Calcutta
5a. CONTRACT NUMBER FA23860814111
5b. GRANT NUMBER
5c. PROGRAM ELEMENT NUMBER
6. AUTHOR(S) Ashish Kumar Dasgupta
5d. PROJECT NUMBER
5e. TASK NUMBER
5f. WORK UNIT NUMBER
7. PERFORMING ORGANIZATION NAME(S) AND ADDRESS(ES) University of Calcutta,92 Acharya Prafulla Chandra Road,Kolkata 700009,India,NA,NA
8. PERFORMING ORGANIZATION REPORT NUMBER N/A
9. SPONSORING/MONITORING AGENCY NAME(S) AND ADDRESS(ES) AOARD, UNIT 45002, APO, AP, 96337-5002
10. SPONSOR/MONITOR’S ACRONYM(S) AOARD
11. SPONSOR/MONITOR’S REPORT NUMBER(S) AOARD-084111
12. DISTRIBUTION/AVAILABILITY STATEMENT Approved for public release; distribution unlimited
13. SUPPLEMENTARY NOTES
14. ABSTRACT The SCINDA receiver has been operational at the Institute of Radio Physics and Electronics, University of Calcutta, Calcutta,India since November 2006. During the period July 2008 through July 2009, operation of the SCINDA receiver has been almostuninterrupted except during the total solar eclipse of July 22, 2009. A dedicated broadband internet connection is operationalfrom the government‐run Bharat Sanchar Nigam Limited (BSNL) since October 2008. An on‐line UPS has beenprocured to prevent data loss due to disruption of power. Data from the SCINDA receiver is available to the Satellite BeaconGroup of this Institute in the post‐processed form. It has been utilized for studying some Space Weather eventsoccurring on February 2, 2008 and September 25, 2008 when post‐sunset scintillations were observed on GPS links fromCalcutta (22.58?N, 88.38?E geographic; magnetic dip: 32?N). The SCINDA GPS S4 and elevation angle plot of September25,2008 showed fluctuations on the SV12 link around 21:30 LT. The period of this report correspond to very low sunspot numberresulting in very few severe Space Weather events as observed on February 02, 2008 and September 25, 2008. Although thecurrent solar cycle has been weak so far, it may take only one powerful Space Weather event to cause serious damage to thetechnological infrastructure on which society relies. This SCINDA station in Kolkata India is operational continuouslythroughout the year supplying data to the network of such stations.
15. SUBJECT TERMS Space weather, Ionospheric Irregularities
16. SECURITY CLASSIFICATION OF: 17. LIMITATION OF ABSTRACT
Same as Report (SAR)
18. NUMBER OF PAGES
7
19a. NAME OFRESPONSIBLE PERSON
a. REPORT unclassified
b. ABSTRACT unclassified
c. THIS PAGE unclassified
Standard Form 298 (Rev. 8-98) Prescribed by ANSI Std Z39-18
with an accuracy of 5 X 10‐4 TEC unit and provides phase of the received signals at both L1 and
L2 frequencies.
Figure 3 shows the variation of CNO (C/N ratio) at L1 and TEC during the evening hours
of September 25, 2008 on the SV12 link from Calcutta using data from the software based GPS
receiver. A patch of scintillation could be observed around 21:30 LT coupled with bite out in
TEC. The phase deviation at L1 and its moving average corresponding to September 25, 2008
for the GPS SV12 link from Calcutta is shown in Figure 4. A patch of phase scintillation may be
observed around 21:36 LT with increased deviation around that time.
The period of this report correspond to very low sunspot number resulting in very few
severe Space Weather events as observed on February 02, 2008 and September 25, 2008.
Although the current solar cycle has been weak so far, it may take only one powerful Space
Weather event to cause serious damage to the technological infrastructure on which society
relies.
The expenditure incurred so far during the period July 2008 through July 2009 has been
INR 198523.00 with a balance of INR 96678.00. In order to sustain the continuous recording and
uploading of the SCINDA data, rental for the broadband internet connection has to be
continued, storage media for archiving the data and batteries for the online UPS procured and
other contingent expenses met. It is hereby proposed to utilize the balance amount of INR
96678.00 during the next one year period for the above pourpose.
Figure 1
Figure 2
Figure 3
1 6 :4 8 1 8 :0 0 1 9 :1 2 2 0 :2 4 2 1 :3 6 2 2 :4 8-8
-6
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0
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S e p te m b e r 2 5 , 2 0 0 8 S V 1 2 S tn : K o lk a ta
L T
CN
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6 46 66 87 07 27 47 67 88 08 28 48 68 89 09 29 49 69 81 0 0
TEC
20:00 20:02 20:03 20:05 20:06 20:08 20:09 20:11-0.03
-0.02
-0.01
0.00
0.01
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LT
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xis
Title
-0.0020
-0.0018
-0.0016
-0.0014
-0.0012
-0.0010
-0.0008
-0.0006
-0.0004
Y2 Axis Title
20:09 20:11 20:12 20:13 20:15 20:16 20:18 20:19 20:21-0.03
-0.02
-0.01
0.00
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xis
Title
-0.0020
-0.0018
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-0.0004
Y2 Axis Title
20:19 20:21 20:22 20:24 20:25 20:26 20:28 20:29 20:31-0.03
-0.02
-0.01
0.00
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Title
-0.0020
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20:29 20:31 20:32 20:34 20:35 20:36 20:38 20:39 20:41-0.03
-0.02
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Title
-0.0020
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Y2 Axis Title
20:39 20:41 20:42 20:44 20:45 20:47 20:48 20:49 20:51-0.03
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Title
-0.0020
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Y2 Axis Title
20:49 20:51 20:52 20:54 20:55 20:57 20:58 21:00 21:01-0.03
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xis
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-0.0020
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Y2 Axis Title
20:58 21:00 21:01 21:02 21:04 21:05 21:07 21:08 21:10-0.03
-0.02
-0.01
0.00
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tle
-0.0020
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Y2 Axis Title
21:08 21:10 21:11 21:12 21:14 21:15 21:17 21:18 21:20-0.03
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Title
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21:18 21:20 21:21 21:23 21:24 21:25 21:27 21:28 21:30-0.03
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21:28 21:30 21:31 21:33 21:34 21:36 21:37 21:38 21:40-0.03
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Title
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21:38 21:40 21:41 21:43 21:44 21:46 21:47 21:48 21:50-0.03
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xis
Title
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21:48 21:50 21:51 21:53 21:54 21:56 21:57 21:59 22:00-0.03
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xis
Title
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Y2 Axis Title
21:59 22:00 22:01 22:03 22:04 22:06 22:07 22:09 22:10-0.03
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xis
Title
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xis Title
22:09 22:10 22:12 22:13 22:14 22:16 22:17 22:19 22:20-0.03
-0.02
-0.01
0.00
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xis
Title
-0.0020
-0.0018
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22:19 22:20 22:22 22:23 22:24 22:26 22:27 22:29 22:30-0.03
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xis
Title
-0.0020
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22:29 22:30 22:32 22:33 22:35 22:36 22:37 22:39 22:40-0.03
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xis
Title
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Y2 Axis Title
September 25, 2008 Stn: Kolkata SV12
Figure 4
Expenditure Incurred during the period July 2008-July 2009 for the project “SCINDA”
Sl.No. Head Sanctioned Amount ($)
Sanctioned Amount in
(Rs.)
Expenditure (Rs.)
Balance(Rs.)
1 Application fees,
Laying of Cables for dedicated Broadband Connection
1000.00 1,000.00
2 Rental for Broadband Connection
1500.00 23,265.00
3 On line UPS with Power Supply
2500.00 91,313.00
4 Storage Media for archiving the data
1000.00 44,245.00
5 Over head 15% 900.00 38,700.00 6,900.00 2,95,201.00 1,98,523.00 96,678.00