<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-24 -083 21:10:00.000"
URSICode="SAA0K"
StationName="SaoLuis"
GeoLatitude="-2.6"
GeoLongitude="315.8"
Source="Ionosonde"
SourceType="DPS-4"
ScalerType="auto">
<SystemInfo UMLStationID="903">
<FrequencyStepping StartFrequency="1.0" StopFrequency="18.0">
<LinearStepping Step="0.05" Units="MHz" />
</FrequencyStepping>
<RangeStepping StartRange="80.0" StopRange="1360.0" >
<LinearStepping Step="5.0" Units="km" />
</RangeStepping>
<AutoScaler Name="Artist5" Version="500200" ArtistFlags="2 2 0 0 0 0 0 0 0 22 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 85% PACIFIC flags: Multiple candidates for F2x cusp, One of F2 cusps was derived from the other</Comments>
<ContactPerson>
<Name>Dr. Mangalathayil Ali Abdu</Name>
<Affiliation>INPE, Division of Aeronomy</Affiliation>
<Address>Av dos Astronautas, 1.758 Jd. Granja - CEP: 12227-010 Sao Jose dos Campos - SP Brasil</Address>
<Email>maabdu@dae.inpe.br</Email>
</ContactPerson>
<StartTime Format="yyyy.MM.dd (DDD) HH:mm:ss" TimeZone="Coordinated Universal Time" >
2026.03.24 (083) 21:10:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.18" Model="IGRF 3.0" Altitude="300"/>
<DeclinationAngle Val="-19.74" Model="IGRF 3.0" Altitude="300"/>
<SunSpotNumber Val="-1.0" Status="predicted"/>
</SolarTerrestrialData>
<DigisondePreface Format="FF">
FF202608303242110009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="12.250" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.569" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="31.473" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="3.050" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="3.050" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="12.550" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="275.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="275.000" Name="h`F2" Units="km" QL="/" DL="/" />
<URSI ID="90" Val="110.000" Name="hmE" Units="km" QL="/" DL="/" />
<URSI ID="83" Val="20.000" Name="yE" Units="km" QL="/" DL="/" />
<URSI ID="86" Val="0.100" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="11.250" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="470.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="0.992" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="3.050" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="3.050" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="398.413" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="307.255" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="9.371" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="131.164" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="53.810" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="68.571" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="127.810" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="2.230" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="185">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
3.05 3.1 3.15 3.2 3.25 3.3 3.35 3.4 3.45 3.5 3.55 3.6 3.65 3.7 3.75 3.8 3.85 3.9 3.95 4.0 4.05 4.1 4.15 4.2 4.25 4.3 4.35 4.4 4.45 4.5 4.55 4.6 4.65 4.7 4.75 4.8 4.85 4.9 4.95 5.0 5.05 5.1 5.15 5.2 5.25 5.3 5.35 5.4 5.45 5.5 5.55 5.6 5.65 5.7 5.75 5.8 5.85 5.9 5.95 6.0 6.05 6.1 6.15 6.2 6.25 6.3 6.35 6.4 6.45 6.5 6.55 6.6 6.65 6.7 6.75 6.8 6.85 6.9 6.95 7.0 7.05 7.1 7.15 7.2 7.25 7.3 7.35 7.4 7.45 7.5 7.55 7.6 7.65 7.7 7.75 7.8 7.85 7.9 7.95 8.0 8.05 8.1 8.15 8.2 8.25 8.3 8.35 8.4 8.45 8.5 8.55 8.6 8.65 8.7 8.75 8.8 8.85 8.9 8.95 9.0 9.05 9.1 9.15 9.2 9.25 9.3 9.35 9.4 9.45 9.5 9.55 9.6 9.65 9.7 9.75 9.8 9.85 9.9 9.95 10.0 10.05 10.1 10.15 10.2 10.25 10.3 10.35 10.4 10.45 10.5 10.55 10.6 10.65 10.7 10.75 10.8 10.85 10.9 10.95 11.0 11.05 11.1 11.15 11.2 11.25 11.3 11.35 11.4 11.45 11.5 11.55 11.6 11.65 11.7 11.75 11.8 11.85 11.9 11.95 12.0 12.05 12.1 12.15 12.2 12.25
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
275.000 275.000 280.000 280.000 280.000 280.000 280.000 280.000 280.000 280.000 280.000 285.000 285.000 285.000 285.000 285.000 285.000 285.000 285.000 285.000 290.000 290.000 290.000 290.000 290.000 290.000 290.000 291.250 292.500 293.750 295.000 296.250 297.500 298.750 300.000 301.250 302.500 303.750 305.000 300.000 300.000 300.000 305.000 307.500 310.000 305.000 305.000 306.000 307.000 308.000 309.000 310.000 310.000 312.500 315.000 315.000 315.000 315.000 316.250 317.500 318.750 320.000 321.250 322.500 323.750 325.000 327.500 330.000 330.000 330.000 330.000 332.500 335.000 336.250 337.500 338.750 340.000 341.250 342.500 343.750 345.000 345.000 345.000 345.000 345.000 345.000 346.250 347.500 348.750 350.000 352.500 355.000 355.000 355.000 355.000 360.000 360.000 360.000 360.000 365.000 365.000 365.000 365.000 367.500 370.000 370.000 370.000 370.000 375.000 375.000 375.000 375.000 375.000 375.000 380.000 380.000 380.000 380.000 382.500 385.000 390.000 390.000 390.000 390.000 390.000 390.000 395.000 395.000 400.000 400.000 400.000 401.667 403.333 405.000 405.000 410.000 415.000 415.000 415.000 420.000 420.000 420.000 420.000 420.000 420.000 420.000 420.000 425.000 430.000 430.000 435.000 440.000 440.000 442.500 445.000 445.000 450.000 450.000 455.000 460.000 460.000 465.000 470.000 470.000 470.000 480.000 480.000 485.000 490.000 493.350 497.031 501.094 505.602 510.634 516.284 522.676 529.966 538.355 548.115 559.611 573.350 590.061 610.824 637.317 672.293
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
63 63 0 60 0 0 0 0 0 0 69 66 0 0 0 0 0 60 0 57 0 0 0 69 69 60 66 0 0 0 0 0 0 0 0 0 0 0 57 66 60 66 69 0 57 60 66 0 66 0 0 63 0 0 66 69 69 0 0 69 0 0 63 0 0 69 0 63 0 66 72 0 63 0 51 0 60 0 0 0 57 0 66 66 72 69 0 66 0 72 57 66 0 72 69 63 66 69 72 60 66 69 72 57 66 66 69 69 60 63 69 69 72 69 69 69 57 72 66 69 54 60 66 66 57 66 66 66 57 63 63 0 0 66 63 60 48 54 60 48 51 57 60 63 60 57 45 0 57 57 0 51 54 48 54 54 54 54 51 48 51 51 45 51 45 48 51 51 51 51 51 51 51 0 51 0 0 51 48 51 48 0 0 0 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
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</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="187">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
90.278 95.0 100.0 105.0 110.0 115.0 120.0 125.0 127.118 130.0 135.0 140.0 144.237 145.0 150.0 155.0 160.0 161.355 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 398.413 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.66 0.86 0.96 0.992 0.975 0.924 0.831 0.777 0.777 0.777 0.777 0.777 0.787 0.849 0.912 0.975 0.992 1.073 1.189 1.312 1.444 1.585 1.736 1.899 2.075 2.263 2.466 2.684 2.917 3.165 3.428 3.707 4.0 4.307 4.626 4.957 5.297 5.645 5.999 6.358 6.72 7.082 7.444 7.803 8.158 8.507 8.849 9.181 9.503 9.813 10.11 10.392 10.658 10.907 11.137 11.349 11.54 11.709 11.857 11.982 12.084 12.162 12.215 12.244 12.25 12.249 12.239 12.217 12.184 12.139 12.085 12.021 11.948 11.867 11.778 11.681 11.578 11.469 11.354 11.234 11.109 10.979 10.846 10.71 10.57 10.428 10.283 10.137 9.988 9.839 9.688 9.537 9.385 9.232 9.08 8.927 8.775 8.623 8.472 8.322 8.172 8.024 7.877 7.731 7.586 7.443 7.301 7.16 7.022 6.885 6.75 6.616 6.485 6.355 6.227 6.101 5.977 5.855 5.735 5.617 5.501 5.386 5.274 5.164 5.055 4.949 4.844 4.741 4.641 4.542 4.445 4.349 4.256 4.164 4.075 3.987 3.9 3.816 3.733 3.652 3.572 3.494 3.418 3.343 3.27 3.198 3.128 3.059 2.992 2.926 2.861 2.798 2.736 2.676 2.616 2.558 2.502 2.446 2.392 2.339 2.287 2.236 2.186 2.137 2.09 2.043 1.998 1.953 1.909 1.867 1.825 1.784 1.744 1.705 1.667 1.63 1.593 1.558 1.523 1.489 1.455 1.423 1.391 1.36 1.329 1.299

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="0.992" PeakHeight="110.0" Num="3" Error="0.0">
-26.47 7.959 -1.211
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="0.992" EndFrequency="12.25" PeakHeight="398.413" Num="5" zHalfNm="307.255" Error="1.905">
-240.549 6.172 -3.396 0.244 0.471
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="51.355" Depth="0.215"/>
<TopsideChapman PeakHeight="398.413" PeakDensity="1861817.6" PeakScaleHeight="68.571" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
