International Laser Ranging Service

SLR Monthly Global Performance Report Card

March 1, 2024 through February 28, 2025

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. Performance charts starting in 2025 include LARES-2.
• 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. Performance charts starting in 2025 include LARES-2.
• 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	17041	3357	4231	24629	252403	35062	15271	302736	197873	5.4	6.6	7.2
Changchun	7237	7994	1727	4985	14706	87564	8038	18137	113739	126116	4.9	3.9	3.9
Wettzell	8834	4709	1438	2332	8479	93854	16314	8428	118596	96080	3.0	8.2	9.5
Graz	7839	4288	1217	2882	8387	68444	10012	9345	87801	81636	2.4	4.0	5.1
Herstmonceux	7840	4502	1257	2471	8230	59778	13904	7697	81379	77219	2.9	8.6	12.1
Kunming	7819	2876	834	4504	8214	35755	4064	9625	49444	64693	4.7	12.5	13.2
Potsdam_3	7841	4652	1229	1295	7176	65463	10051	4545	80059	53680	2.5	9.9	13.4
Matera_MLRO	7941	3475	1975	1430	6880	32463	19006	11104	62573	100947	1.2	3.8	4.7
Greenbelt	7105	5206	832	666	6704	91804	8488	2597	102889	49105	5.7	9.2	9.3
Monument_Peak	7110	5191	782	235	6208	81459	7405	1716	90580	40648	3.1	5.8	6.9
Shanghai_2	7821	2368	869	2081	5318	20273	8484	9182	37939	68141	2.5	5.2	4.6
Mount_Stromlo_2	7825	2116	1564	921	4601	15748	15439	5680	36867	62693	3.7	4.9	9.1
Badary	1890	3441	869	49	4359	25858	4255	125	30238	15221		11.2	13.9
Arequipa	7403	3762	465	0	4227	35081	2522	0	37603	16127	3.6	6.9	9.3
Wuhan	7396	1888	552	1301	3741	19647	4339	6520	30506	46219	4.9	7.4	6.7
Beijing	7249	1474	384	1602	3460	12853	1769	3235	17857	22758	5.6	9.7	10.9
Simosato	7838	2880	545	1	3426	33180	4593	2	37775	17151	5.6	7.2	15.3
Haleakala	7119	2447	795	0	3242	42104	8250	0	50354	24830	2.2	5.8	6.4
Grasse_MEO	7845	769	824	1495	3088	8246	9454	5842	23542	57232	10.5	15.0	16.1
Riga	1884	1540	594	326	2460	18645	5025	1585	25255	20203	7.3	14.1	17.7
Tenerife	7701	935	442	915	2292	10188	2844	3286	16318	24292	5.3	9.9	5.9
Kiev	1824	1683	498	0	2181	17496	3650	0	21146	10778	9.6	19.5	57.7
Tsukuba	7306	871	399	882	2152	11071	2483	2424	15978	19523	6.4	10.7	6.5
Hartebeesthoek_HARL	7501	1802	277	1	2080	24751	2436	5	27192	11758	5.1	8.8	10.0
Irkutsk	1891	1566	465	8	2039	11011	2087	15	13113	7226	37.6	26.2	32.9
Katzively	1893	1767	205	1	1973	20432	1373	4	21809	8277	26.6	34.8	23.7
Svetloe	1888	1459	449	1	1909	11384	2913	4	14301	7614		11.2	15.6
Tahiti	7124	1334	205	46	1585	14980	1445	184	16609	7709	3.0	7.2	8.0
Simeiz	1873	1244	244	14	1502	10778	1671	53	12502	5773	29.6	11.6	13.0
Borowiec	7811	977	321	55	1353	13246	3256	228	16730	10626	15.0	21.0	18.7
Zelenchukskaya	1889	1061	284	1	1346	10992	1988	2	12982	7651		35.8	28.5
Yebes	7817	217	387	42	646	3089	4030	211	7330	8434	6.9	8.0	5.7
Mendeleevo	1874	66	151	12	229	1184	1867	33	3084	4027	34.8	0.1	0.8
Apache_Point	7045	0	0	0	0	0	0	0	0	342	0.3
Hartebeesthoek_HRTL	7503	10	0	0	10	46	0	0	46	23	28.2

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	18	87	12	12	4.93	12	13	6.15	18	45	8.45	7	9	4.64	7	8	7.99
Grasse_MEO	7845	1064.0	47	599	27	85	25.56	29	78	22.99	47	226	31.26	34	118	23.99	31	92	29.61
Grasse_MEO	7845	532.0	11	118	6	20	21.83	8	26	21.33	11	43	29.19	9	24	28.14	3	5	37.13
Matera_MLRO	7941	532.0	6	16							6	16	44.26
Wettzell	8834	1064.0	3	45										1	4	23.80	2	41	24.34

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

33

3

4

24.00

3

4

22.27

5

17

24.36

3

5

23.10

2

3

28.95

Matera_MLRO

7941

532.0

1

5

1

5

50.96

Wettzell

8834

1064.0

2

41

2

41

24.34

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					6.1	30.0	20.8	98	4.8	26.5	26.8	68
Simeiz	1873					38.9		32.3	97	5.6
Mendeleevo	1874					3.0		3.4	100	4.1		5.0	98
Riga	1884					4.3	20.8	14.7	100	4.4	23.3	19.8	96
Svetloe	1888					3.2	10.5	4.5	100	2.9	12.6	4.5	99
Zelenchukskaya	1889					5.0	10.0	6.1	100	4.5	14.8	7.3	93
Badary	1890					1.7	7.8	2.5	100	1.9	10.3	5.0	100
Irkutsk	1891					3.9	9.6	3.4	100	3.6	9.3	5.0	97
Katzively	1893					11.8		4.6	98	5.9
Yarragadee	7090					2.3	4.5	0.6	100	3.1	9.4	1.4	99
Greenbelt	7105					1.7	5.3	1.2	100	2.6	12.0	3.3	99
Monument_Peak	7110					1.6	6.5	2.5	100	2.4	11.0	3.5	100
Haleakala	7119					1.8	6.7	1.0	100	2.5	8.3	1.7	99
Tahiti	7124					1.7	6.7	3.7	100	2.5	11.0	6.8	99
Changchun	7237					1.7	10.4	5.7	100	1.9	10.7	9.8	100
Beijing	7249					3.3	18.2	9.0	99	2.7	18.6	9.4	98
Tsukuba	7306					1.3	27.5	8.2	100	3.3	25.7	7.0	99
Sejong	7394					2.0				2.0
Wuhan	7396					1.0	11.5	6.3	100	2.3	13.1	7.6	100
Arequipa	7403					2.5		10.5	98	4.8		5.5	96
Hartebeesthoek_HARL	7501							4.0	100			7.2	97
Tenerife	7701					1.3	12.5	2.8	100	1.7	14.1	3.9	100
Zimmerwald_532	7810					2.0				3.3
Borowiec	7811					5.1	14.9	4.4	100	5.4	25.1	7.6	96
Yebes	7817					0.7				1.8	12.0
Kunming	7819					4.3	13.9	7.4	100	3.6	13.4	5.7	97
Shanghai_2	7821					2.1	5.5	4.2	100	2.1	10.9	4.4	98
Mount_Stromlo_2	7825					2.1	4.1	1.2	100	2.4	9.1	2.1	100
Simosato	7838					7.9	13.2	5.5	99	5.1	14.0	3.7	89
Graz	7839					1.0	5.4	1.3	100	1.7	7.4	2.8	100
Herstmonceux	7840					0.9	4.9	1.0	100	1.5	9.9	2.1	100
Potsdam_3	7841					1.3	8.9	2.8	99	1.7	13.1	5.7	97
Grasse_MEO	7845					2.8	9.3	1.4	100	3.3	13.3	2.5	99
Matera_MLRO	7941					1.0	5.3	0.8	100	1.6	8.3	2.5	100
Wettzell	8834					1.0	7.5	1.4	100	1.4	8.6	3.2	100