<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-09 -068 21:50:00.000"
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" >
2026.03.09 (068) 21:50:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.16" 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">
FF202606803092150009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="11.200" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.541" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="28.463" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.800" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="2.800" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="11.450" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="325.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="325.000" 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="0.200" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="10.900" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="526.442" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="0.440" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="2.800" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="2.800" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="421.835" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="360.518" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="8.936" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="91.479" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="30.711" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="45.413" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="97.180" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.580" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="169">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
2.8 2.85 2.9 2.95 3.0 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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
325.000 325.556 326.111 326.667 327.222 327.778 328.333 328.889 329.444 330.000 330.000 335.000 335.000 335.000 335.000 335.000 335.000 335.000 340.000 341.250 342.500 343.750 345.000 340.000 340.000 342.500 345.000 345.000 345.000 346.667 348.333 350.000 350.000 350.000 350.000 350.000 350.000 351.667 353.333 355.000 356.667 358.333 360.000 360.000 360.000 360.000 360.000 360.000 362.500 365.000 365.000 365.000 365.000 365.000 366.250 367.500 368.750 370.000 370.000 370.000 370.000 370.000 372.500 375.000 376.250 377.500 378.750 380.000 380.000 380.000 381.429 382.857 384.286 385.714 387.143 388.571 390.000 391.250 392.500 393.750 395.000 396.250 397.500 398.750 400.000 401.250 402.500 403.750 405.000 405.000 405.000 405.000 405.000 406.667 408.333 410.000 411.667 413.333 415.000 420.000 420.000 420.000 421.875 423.750 425.625 427.500 429.375 431.250 433.125 435.000 435.000 435.000 436.667 438.333 440.000 441.667 443.333 445.000 446.667 448.333 450.000 450.000 450.000 450.000 455.000 455.000 457.000 459.000 461.000 463.000 465.000 465.000 470.000 470.000 470.000 475.000 476.875 478.750 480.625 482.500 484.375 486.250 488.125 490.000 490.000 492.500 495.000 495.000 495.000 500.000 500.000 500.000 505.000 510.000 510.000 510.000 510.000 510.000 515.000 517.500 520.000 523.010 526.442 530.390 534.980 540.383 546.835 554.676 564.406
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
72 0 0 0 0 0 0 0 0 69 69 66 69 0 0 69 72 69 66 0 0 0 51 57 0 0 60 51 72 0 0 66 69 51 0 0 57 0 0 66 0 0 57 0 0 0 0 69 0 63 0 69 0 72 0 0 0 72 60 0 66 69 0 69 0 63 0 69 0 69 0 0 0 0 69 0 69 51 0 0 0 0 54 0 0 66 0 0 63 66 0 69 72 0 66 0 0 0 69 60 63 66 0 0 0 0 60 0 0 60 66 66 0 0 66 0 0 0 0 0 60 63 0 72 63 66 0 0 0 0 60 63 54 60 63 54 0 0 0 0 0 54 0 48 54 0 51 54 54 51 0 48 51 48 0 48 0 42 48 45 45 45 45 0 45 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" >
92.172 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 138.749 140.0 145.0 150.0 155.0 160.0 165.0 167.499 170.0 175.0 180.0 185.0 190.0 195.0 196.248 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 421.835 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.291 0.381 0.426 0.44 0.435 0.418 0.39 0.345 0.278 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.221 0.263 0.304 0.346 0.388 0.43 0.44 0.53 0.624 0.714 0.808 0.907 1.014 1.13 1.257 1.396 1.548 1.713 1.893 2.086 2.294 2.514 2.747 2.992 3.246 3.511 3.783 4.064 4.351 4.646 4.946 5.253 5.565 5.882 6.205 6.532 6.864 7.2 7.54 7.884 8.23 8.577 8.923 9.267 9.605 9.933 10.244 10.53 10.781 10.984 11.126 11.195 11.2 11.195 11.166 11.114 11.04 10.946 10.835 10.707 10.565 10.411 10.245 10.07 9.886 9.695 9.499 9.298 9.093 8.886 8.677 8.466 8.256 8.046 7.836 7.628 7.422 7.218 7.017 6.818 6.623 6.43 6.242 6.057 5.876 5.698 5.525 5.356 5.191 5.029 4.872 4.719 4.57 4.425 4.284 4.147 4.014 3.885 3.759 3.637 3.519 3.404 3.293 3.185 3.08 2.979 2.881 2.786 2.694 2.604 2.518 2.434 2.353 2.275 2.199 2.126 2.055 1.986 1.92 1.856 1.793 1.733 1.675 1.619 1.565 1.512 1.461 1.412 1.365 1.319 1.274 1.231 1.19 1.15 1.111 1.074 1.038 1.003 0.969 0.936 0.904 0.874 0.844 0.816 0.788 0.762 0.736 0.711 0.687 0.664 0.642 0.62 0.599 0.579 0.559 0.54 0.522 0.504 0.487 0.471 0.455 0.44 0.425 0.41 0.396 0.383 0.37 0.358 0.345

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="0.44" PeakHeight="110.0" Num="3" Error="0.0">
-21.175 3.636 -0.289
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="0.44" EndFrequency="11.2" PeakHeight="421.835" Num="5" zHalfNm="360.518" Error="4.623">
-209.59 -30.625 18.238 -7.175 3.565
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="86.248" Depth="0.24"/>
<TopsideChapman PeakHeight="421.835" PeakDensity="1556327.5" PeakScaleHeight="45.413" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
