Key Stone Project

KSP VLBI / Observation Frequency Sequences

In geodetic VLBI experiments, data from several observation channels with narrow frequency bands are recorded simultaneously and synthesized together after the cross correlation processing. Following tables are the list of local frequencies, the lowest frequencies of each observation channel, used in the KSP VLBI experiments.


2001.9.3-Present

# Except for Joint Experiments with Kashima 34m listed in the next item.

Channel #ReceiverLocal FrequencyBand Width
(MHz) (MHz)
1 X 7714.99 8.0
2 X 7724.99 8.0
3 X 7754.99 8.0
4 X 7814.99 8.0
5 X 8034.99 8.0
6 X' 8234.99 8.0
7 X' 8414.99 8.0
8 X' 8524.99 8.0
9 X' 8564.99 8.0
10 X' 8584.99 8.0
11 S 2274.99 8.0
12 S 2284.99 8.0
13 S 2294.99 8.0
14 S 2314.99 8.0
15 S 2334.99 8.0
16 S 2364.99 8.0

Frequency table for 256Mbps experiments. Effective frequency bandwidths are 350.6 MHz for X-band and 30.9 MHz for S-band. Ratios of side-lobe peak to main-lobe peak are 0.575 for X-band and 0.437 for S-band.


2001.8.31

Channel #ReceiverLocal FrequencyBand Width
(MHz) (MHz)
1 X 7714.99 8.0
2 X 7724.99 8.0
3 X 7754.99 8.0
4 X 7814.99 8.0
5 X 8034.99 8.0
6 X' 8234.99 8.0
7 X' 8414.99 8.0
8 X' 8524.99 8.0
9 X' 8564.99 8.0
10 X' 8584.99 8.0
11 S 2224.99 8.0
12 S 2234.99 8.0
13 S 2304.99 8.0
14 S 2364.99 8.0
15 S 2454.99 8.0
16 S 2484.99 8.0

Frequency table for 256Mbps experiments. Effective frequency bandwidths are 350.6 MHz for X-band and 100.2 MHz for S-band. Ratios of side-lobe peak to main-lobe peak are 0.575 for X-band and 0.579 for S-band.


1997.4.7-1997.4.10 and 1997.6.4-2001.8.29

# Except for Joint Experiments with Kashima 34m listed in the next item.

Channel #ReceiverLocal FrequencyBand Width
(MHz) (MHz)
1 X 7714.99 8.0
2 X 7724.99 8.0
3 X 7754.99 8.0
4 X 7814.99 8.0
5 X 8034.99 8.0
6 X' 8234.99 8.0
7 X' 8414.99 8.0
8 X' 8524.99 8.0
9 X' 8564.99 8.0
10 X' 8584.99 8.0
11 S 2154.99 8.0
12 S 2164.99 8.0
13 S 2234.99 8.0
14 S 2294.99 8.0
15 S 2384.99 8.0
16 S 2414.99 8.0

Frequency table for 256Mbps experiments. Effective frequency bandwidths are 350.6 MHz for X-band and 100.2 MHz for S-band. Ratios of side-lobe peak to main-lobe peak are 0.575 for X-band and 0.579 for S-band.


1997.5.1, 1997.10.7, 1997.11.18, 1998.2.16, 1998.5.1, and 1998.6.20

Channel #ReceiverLocal FrequencyBand Width
(MHz) (MHz)
1 X 7874.99 2.0
2 X 7884.99 2.0
3 X 7894.99 2.0
4 X 8024.99 2.0
5 X 8124.99 2.0
6 X' 8254.99 2.0
7 X' 8514.99 2.0
8 X' 8554.99 2.0
9 X' 8574.99 2.0
10 X' 8584.99 2.0
11 S 2214.99 2.0
12 S 2224.99 2.0
13 S 2234.99 2.0
14 S 2264.99 2.0
15 S 2294.99 2.0
16 S 2304.99 2.0

Frequency table for 64Mbps Joint experiments with 34m station at Kashima. Effective frequency bandwidths are 290.3 MHz for X-band and 34.4 MHz for S-band. Ratios of side-lobe peak to main-lobe peak are 0.58 for X-band and 0.54 for S-band.


1996.6.24-1997.4.6 and 1997.4.11-1997.6.3

Channel #ReceiverLocal FrequencyBand Width
(MHz) (MHz)
1 X 7714.99 2.0
2 X 7724.99 2.0
3 X 7754.99 2.0
4 X 7814.99 2.0
5 X 8034.99 2.0
6 X' 8234.99 2.0
7 X' 8414.99 2.0
8 X' 8524.99 2.0
9 X' 8564.99 2.0
10 X' 8584.99 2.0
11 S 2154.99 2.0
12 S 2164.99 2.0
13 S 2234.99 2.0
14 S 2294.99 2.0
15 S 2384.99 2.0
16 S 2414.99 2.0

S band frequency sequence was modified to prevent side lobe peak to be picked up. Effective frequency bandwidths are 350.6 MHz for X-band and 100.2 MHz for S-band. Ratios of side-lobe peak to main-lobe peak are 0.575 for X-band and 0.579 for S-band.


1996.6.21-1996.6.23

Channel #ReceiverLocal FrequencyBand Width
(MHz) (MHz)
1 X 7714.99 2.0
2 X 7724.99 2.0
3 X 7754.99 2.0
4 X 7814.99 2.0
5 X 8034.99 2.0
6 X' 8234.99 2.0
7 X' 8414.99 2.0
8 X' 8524.99 2.0
9 X' 8564.99 2.0
10 X' 8584.99 2.0
11 S 2154.99 2.0
12 S 2174.99 2.0
13 S 2244.99 2.0
14 S 2324.99 2.0
15 S 2364.99 2.0
16 S 2374.99 2.0

This frequency sequence was used for only three days tentatively.


1996.6.5-1996.6.20

Channel #ReceiverLocal FrequencyBand Width
(MHz) (MHz)
1 X 7714.99 2.0
2 X 7724.99 2.0
3 X 7754.99 2.0
4 X 7814.99 2.0
5 X 8034.99 2.0
6 X' 8234.99 2.0
7 X' 8414.99 2.0
8 X' 8524.99 2.0
9 X' 8564.99 2.0
10 X' 8584.99 2.0
11 S 2114.99 2.0
12 S 2184.99 2.0
13 S 2234.99 2.0
14 S 2314.99 2.0
15 S 2344.99 2.0
16 S 2484.99 2.0

Frequency sequence of S-band was changed to increase deray ambiguity from 25 nsec to 100 nsec. Effective frequency bandwidths are 350.6 MHz for X-band and 119.5 MHz for S-band. Ratios of side-lobe peak to main-lobe peak are 0.575 for X-band and 0.636 for S-band.


1996.5.14-1996.6.4

Channel #ReceiverLocal FrequencyBand Width
(MHz) (MHz)
1 X 7714.99 2.0
2 X 7724.99 2.0
3 X 7754.99 2.0
4 X 7814.99 2.0
5 X 8034.99 2.0
6 X' 8234.99 2.0
7 X' 8414.99 2.0
8 X' 8524.99 2.0
9 X' 8564.99 2.0
10 X' 8584.99 2.0
11 S 2134.99 2.0
12 S 2174.99 2.0
13 S 2254.99 2.0
14 S 2334.99 2.0
15 S 2414.99 2.0
16 S 2454.99 2.0

Number of channels for X-band was increased from 8 to 10. Effective frequency bandwidths are 350.6 MHz for X-band and 117.8 MHz for S-band. Ratios of side-lobe peak to main-lobe peak are 0.575 for X-band and 0.455 for S-band.


1995.1.17 - 1995.1.19

Channel #ReceiverLocal FrequencyBand Width
(MHz) (MHz)
1 X 8214.99 2.0
2 X 8224.99 2.0
3 X 8254.99 2.0
4 X 8314.99 2.0
5 X' 8424.99 2.0
6 X' 8504.99 2.0
7 X' 8554.99 2.0
8 X' 8574.99 2.0
9 S 2214.99 2.0
10 S 2224.99 2.0
11 S 2234.99 2.0
12 S 2264.99 2.0
13 S 2294.99 2.0
14 S 2304.99 2.0

This frequency sequency was used only when Kashima 34m VLBI station participated in the KSP experiment.


1994.8.29 - 1994.12.24, 1995.1.30-1996.5.13

Channel #ReceiverLocal FrequencyBand Width
(MHz) (MHz)
1 X 7794.99 2.0
2 X 7824.99 2.0
3 X 7884.99 2.0
4 X 8064.99 2.0
5 X' 8244.99 2.0
6 X' 8424.99 2.0
7 X' 8544.99 2.0
8 X' 8574.99 2.0
9 S 2104.99 2.0
10 S 2124.99 2.0
11 S 2194.99 2.0
12 S 2274.99 2.0
13 S 2314.99 2.0
14 S 2324.99 2.0

This frequency sequency was used when only 14 frequency channels were used as in the conventional K-3 system.


Characteristics of Receivers

ReceiverLocal FrequencyRF Frequency Band
X 7200 MHz 7700 - 8200 MHz
X' 7600 MHz 8100 - 8600 MHz
S 3000 MHz 2000 - 2500 MHz


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Last Update: August 31, 2001

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