International Laser Ranging Service

SLR Monthly Global Performance Report Card

May 1, 2022 through April 30, 2023

The performance report card is divided into three tables for readability. Table 1 contains performance parameters based on data volume, on-site processing statistics and operational compliance issues. Tables L1 and L2 contain information about Lunar Laser Ranging during the past year. Table 2 contains performance parameters based on various Analysis Centers' rapid orbital analysis results.

A blank in any column in any of the tables implies either that there was no data or that there was insufficient data.

Below are the detailed descriptions of each column in Table 1 plots of the columns are linked in this description and in Table 1:

• Column 1 is the station location name.
• Column 2 is the monument marker number.
• Column 3 is the LEO pass total during the past 12 months.
• Column 4 is the LAGEOS and LARES pass total during the past 12 months.
• Column 5 is the high satellite pass total during the past 12 months.
• Column 6 is the pass total (i.e., all satellites) during the past 12 months.
• Column 7 is the LEO NP total during the past 12 months.
• Column 8 is the LAGEOS and LARES NP total during the past 12 months.
• Column 9 is the high satellite NP total during the past 12 months.
• Column 10 is the NP total (i.e., all satellites) during the past 12 months.
• Column 11 is the total tracking minutes (i.e., all satellites) during the past 12 months. This is computed by the summation of the number of normal points multiplied by its bin size in minutes.
• Column 12 is the average single-shot calibration RMS, in millimeters, during the last quarter.
• Column 13 is the average single-shot Starlette RMS, in millimeters, during the last quarter.
• Column 14 is the average single-shot LAGEOS RMS, in millimeters, during the last quarter.

The first entry in each table is for the performance baseline goal. Note: There are no baseline goals for NP data quantities, single shot RMSs.

Additional Notes: Only stations that have supplied data within the last year are included in the table. The table is sorted in descending order by total passes.

Table 1: Station performance parameters based on data volume, on-site processing statistics and operational compliance issues

Site Information		Data Volume									Data Quality
Column 1	2	3	4	5	6	7	8	9	10	11	12	13	14
Station Location	Station Number	LEO pass Tot	LAGEOS and LARES pass Tot	High pass Tot	Total passes	LEO NP Total	LAGEOS and LARES NP Total	High NP Total	Total NP	Minutes of Data	Cal. RMS	Star RMS	LAG RMS
Baseline		2300	600	3000	3500
Yarragadee	7090	18685	3032	4491	26208	295210	29229	17308	341747	213707	3.2	5.5	5.5
Changchun	7237	9321	1423	4570	15314	126468	10753	18200	155421	138926	6.6	9.8	10.6
Mount_Stromlo_2	7825	7771	1689	1812	11272	112885	14638	12159	139682	126291	2.7	11.4	7.9
Wettzell	8834	5368	1277	3132	9777	60742	9227	10811	80780	88493	2.9	8.0	9.0
Herstmonceux	7840	5847	1145	1345	8337	76711	12345	4410	93466	65820	3.2	8.7	12.1
Greenbelt	7105	6536	885	431	7852	118541	10070	1995	130606	56818	3.9	8.2	8.9
Monument_Peak	7110	6837	730	46	7613	104052	6999	146	111197	40533	2.6	6.3	7.9
Kunming	7819	2916	685	3070	6671	30392	3306	6534	40232	47258	3.8	12.2	11.6
Graz	7839	3765	767	1667	6199	61859	6169	5209	73237	56568	2.4	3.9	5.2
Shanghai_2	7821	2506	710	2828	6044	21453	6583	12448	40484	82802	7.0	9.2	5.2
Wuhan	7396	2067	611	2152	4830	21465	4656	8828	34949	59749	5.2	7.4	6.7
Matera_MLRO	7941	2736	976	506	4218	21974	6316	2639	30929	36777	1.3	5.8	6.5
Wettzell_SOSW	7827	1588	531	1678	3797	11901	2833	4579	19313	31494	9.1	12.1	12.2
Potsdam_3	7841	2656	579	559	3794	39002	5027	2042	46071	29378	2.6	6.3	9.3
Grasse_MEO	7845	798	721	1937	3456	9537	9017	7949	26503	67484	9.2	13.7	15.2
Beijing	7249	1351	301	1121	2773	13709	1817	2806	18332	21128	4.2	8.5	8.9
Katzively	1893	2258	279	8	2545	27303	2015	44	29362	11773	23.3	39.4	26.9
Simeiz	1873	2027	283	24	2334	17681	1724	130	19535	8353	19.5	11.6	13.6
Zelenchukskaya	1889	1648	626	16	2290	17122	5580	64	22766	16564		31.1	36.2
Arequipa	7403	2171	59	0	2230	17360	268	0	17628	6409	4.3	7.4	6.6
Hartebeesthoek_HARL	7501	1690	288	184	2162	22162	2416	804	25382	15133	5.3	8.8	10.3
Tenerife	7701	463	293	901	1657	4646	2215	3512	10373	23581	5.5	10.9	5.9
Svetloe	1888	1162	464	20	1646	8663	3376	54	12093	7826		10.9	15.3
Haleakala	7119	1325	276	0	1601	21155	2821	0	23976	11105	2.3	5.4	5.6
Badary	1890	1117	287	11	1415	8132	1456	30	9618	4695		37.0	31.0
Simosato	7838	1015	237	0	1252	8905	1643	0	10548	6222	6.9	7.8	12.3
Borowiec	7811	686	204	14	904	11135	2159	67	13361	7005	14.3	19.0	18.5
Hartebeesthoek_HRTL	7503	548	272	0	820	4798	1786	0	6584	5023	26.4	17.4	21.5
San_Fernando	7824	797	13	0	810	4979	36	0	5015	1720	6.9	13.4	20.1
Tahiti	7124	582	84	35	701	7009	712	140	7861	4087	3.0	7.4	7.5
Irkutsk	1891	385	146	6	537	2007	711	19	2737	2033	39.1	24.3	32.2
Sejong	7394	166	35	0	201	2319	392	0	2711	1484	4.1	8.7	9.9
Arkhyz	1886	80	71	0	151	760	420	0	1180	1004		30.1	25.2
Mendeleevo	1874	27	91	6	124	302	1225	21	1548	2576	31.7	20.8	26.7
Apache_Point	7045	0	0	0	0	0	0	0	0	224	0.4

Below are the detailed descriptions of each column in Tables L1 and L2:

• the first column, L1, is the station location name.
• the second column, L2, is the monument marker number.
• the third column, L3, is the wavelength.
• the fourth column, L4, is the number of passes during the past 12 months.
• the fifth column, L5, is the number of Lunar Laser Ranging normal points during the past 12 months
• the sixth, ninth, twelfth, fifteenth, and eighteenth columns, L6, L9, L12, L15, L18, are the number of passes taken, specific to a retroreflector, during the past 12 months in which there were Lunar ranging measurements.
• the seventh, tenth, thirteenth, sixteenth, and nineteenth columns, L7, L10, L13, L16, L19 are the number of normal points taken, specific to a retroreflector, during the past 12 months
• the eighth, eleventh, fourteenth, seventeenth, and twentieth columns, L8, L11, L14, L17, L20 are the average Lunar Laser Ranging normal points rms 12 months in mm for a specific retroreflector

Table L1: Lunar Laser Ranging information during the past year

Last 12 months			All reflectors		Apollo-11			Apollo-14			Apollo-15			Luna-17			Luna-21
Column L1	L2	L3	L4	L5	L6	L7	L8	L9	L10	L11	L12	L13	L14	L15	L16	L17	L18	L19	L20
Station Location	Station number	λ	Passes	NPTs	Passes	NPTs	RMS	Passes	NPTs	RMS	Passes	NPTs	RMS	Passes	NPTs	RMS	Passes	NPTs	RMS
Apache Point	7045	532.0	8	58	8	11	4.93	7	10	3.48	8	25	4.00	5	7	3.13	3	5	2.40
Grasse_MEO	7845	1064.0	46	616	27	106	22.04	30	105	23.87	42	220	38.56	27	93	22.28	24	92	23.58
Grasse_MEO	7845	532.0	2	12	1	1	30.80	1	1	29.00	2	6	37.95	2	4	28.10
Matera_MLRO	7941	532.0	7	16	3	5	43.76	1	1	62.40	6	10	49.49
Wettzell	8834	1064.0	6	96							5	79	14.01	1	17	16.64

Table L2: Lunar Laser Ranging information during the past 3 months

Last 3 months

All reflectors

Apollo-11

Apollo-14

Apollo-15

Luna-17

Luna-21

Column L1

L2

L3

L4

L5

L6

L7

L8

L9

L10

L11

L12

L13

L14

L15

L16

L17

L18

L19

L20

Station Location

Station number

λ

Passes

NPTs

Passes

NPTs

RMS

Passes

NPTs

RMS

Passes

NPTs

RMS

Passes

NPTs

RMS

Passes

NPTs

RMS

Grasse_MEO

7845

1064.0

5

86

4

15

26.13

4

15

24.20

5

20

47.74

4

16

18.20

4

20

18.25

Wettzell

8834

1064.0

3

50

3

50

13.58

Below are the detailed descriptions of each column in Table 2:

• the first column is the station location name.
• the second column is the monument marker number.
• following columns are in grouped by analysis center with four columns for each
  • the first AC column is the average LAGEOS normal point RMS, in millimeters, during the last 3 months
  • the second AC column is the measure of short term bias stability, in millimeters, during the last 3 months. The short term stability is computed as the standard deviation about the mean of the pass-by-pass range biases (minimum number of passes in the last 3 months is 10)
  • the third AC column is the measure of long term bias stability, in millimeters, during the past year. The long term stability is the standard deviation of the monthly range bias estimates. A station must have tracked LAGEOS (1,2) in at least 8 of the last 12 months in order to compute this metric.
  • the fourth AC column is the percentage of LAGEOS normal points that were accepted in the analysis.

The first entry in each table is for the performance baseline goal.

Additional Notes: Only stations that have supplied data within the last year are included in the table. The table is sorted in descending order by total data volume.

Table 2: Performance parameters based on various Analysis Centers' rapid orbital analysis results.

Site Information		DGFI Orbital Analysis				Hitotsubashi Univ. Orbital Analysis				JCET Orbital Analysis				MCC Orbital Analysis				SHAO Orbital Analysis
Station Location	Station Number	LAG NP RMS (mm)	short term (mm)	long term (mm)	% good LAG. NP	LAG NP RMS (mm)	short term (mm)	long term (mm)	% good LAG. NP	LAG NP RMS (mm)	short term (mm)	long term (mm)	% good LAG. NP	LAG NP RMS (mm)	short term (mm)	long term (mm)	% good LAG. NP	LAG NP RMS (mm)	short term (mm)	long term (mm)	% good LAG. NP
Baseline		10.0	20.0	10.0	95	10.0	20.0	10.0	95	10.0	20.0	10.0	95	10.0	20.0	10.0	95	10.0	20.0	10.0	95
Kiev	1824					25.3				4.6
Simeiz	1873					19.5		8.9	97	6.8		23.1	61
Mendeleevo	1874							11.0	100			10.1	93			7.5	98			10.2	97
Riga	1884					3.0				3.1	11.3	7.4	98
Svetloe	1888					2.0	10.1	3.4	100	1.9	10.8	3.7	99	2.3	12.9	7.0	100	1.0	24.4	7.1	95
Zelenchukskaya	1889					6.4	15.0	5.2	100	3.9	21.6	7.2	94	6.4	11.1	6.0	97	5.3	23.5	5.7	94
Badary	1890					6.4	9.1	14.0	100	3.1	16.2	14.5	93	7.4	17.7	13.4	97	3.1	26.8	15.4	95
Irkutsk	1891							6.8	100			11.6	93			16.0	97
Katzively	1893					10.1	12.8	12.5	99	4.3		13.7	82	8.1		12.0	92
Yarragadee	7090					1.6	5.4	0.8	100	2.1	17.2	1.1	100	4.0	16.2	1.8	99
Greenbelt	7105					1.9	7.9	2.8	100	2.2	18.8	3.3	99	2.3	13.7	4.4	98
Monument_Peak	7110					2.0	10.5	2.4	100	2.3	16.4	4.9	99	2.5	12.6	3.5	99
Haleakala	7119					1.3	5.2	3.2	100	2.0	21.4	4.0	100	3.5	17.5	5.7	100
Tahiti	7124					1.6	7.3			1.9	9.9			2.9	14.3
Changchun	7237					3.0	16.2	5.3	100	2.7	18.0	7.2	98	3.6	21.2	7.5	98	1.2		6.6	96
Beijing	7249							10.3	100			11.6	99			8.2	100
Tsukuba	7306					1.1	8.8			2.5	25.7
Sejong	7394					4.0				4.7				4.0
Wuhan	7396					1.6	16.1	4.9	100	1.4	16.8	5.6	100	3.3	19.7	5.5	99	1.1	0.8	2.0	2
Hartebeesthoek_HARL	7501					2.2	11.1	4.5	100	2.9	25.4	4.9	98	2.6	18.2	9.3	98
Tenerife	7701					1.5	18.3	4.6	100	1.4	15.1	3.6	100
Borowiec	7811					4.2	9.2	5.3	100	4.1	14.0	6.2	97	4.3	9.9	3.9	99	3.6	14.9	5.8	94
Kunming	7819					4.5	37.2	14.7	100	3.6	43.0	14.6	96	5.7	35.3	22.3	99
Shanghai_2	7821					1.5	12.1	4.1	100	1.8	17.2	4.6	99	2.6	17.9	5.2	99	2.2	15.3	8.5	96
Mount_Stromlo_2	7825					2.3	4.6	1.2	100	2.3	13.3	2.0	99	2.6	16.2	3.2	98
Wettzell_SOSW	7827					1.9	11.1	3.1	100	1.6	11.8	4.1	100	6.8	14.3
Simosato	7838							5.3	97			6.0	86			6.9	95
Graz	7839					1.1	6.1	1.4	100	1.1	9.8	2.4	100	2.5	10.5	2.6	98	0.5	11.2	1.7	96
Herstmonceux	7840					0.7	4.5	1.2	100	1.0	9.2	1.1	100	1.4	8.7	2.6	100	0.5	3.1	1.3	96
Potsdam_3	7841					1.2	5.0	3.8	100	1.3	12.3	4.3	99	1.4	9.9	5.2	98	0.8	16.2	8.1	96
Grasse_MEO	7845					2.7	8.3	1.6	100	2.8	15.0	4.0	99	3.1	10.6	2.9	97			3.3	95
Matera_MLRO	7941							1.8	100			6.1	100			4.8	99			4.2	96
Wettzell	8834					0.9	6.1	1.6	100	1.0	10.3	1.9	100	9.3	49.6	4.6	97	0.5	10.4	3.1	97