<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-25 -084 17:50:00.000"
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" >
2026.03.25 (084) 17:50:00</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">
FF202608403251750009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="11.950" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.549" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="30.457" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="4.250" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="4.250" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="12.250" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="220.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="220.000" 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="0.150" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="11.100" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="485.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="3.092" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="4.250" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="4.250" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.219" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="373.580" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="268.711" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="9.352" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="141.945" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="59.979" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="77.964" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="168.000" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.500" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="155">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
220.000 225.000 230.000 235.000 238.333 241.667 245.000 248.333 251.667 255.000 258.333 261.667 265.000 268.333 271.667 275.000 275.000 275.000 280.000 285.000 285.000 290.000 290.000 290.000 290.000 295.000 296.000 297.000 298.000 299.000 300.000 302.500 305.000 305.000 305.000 310.000 310.000 310.000 310.000 315.000 315.000 315.000 320.000 320.000 320.000 325.000 325.000 325.000 325.000 325.000 330.000 335.000 335.000 335.000 335.000 335.000 340.000 340.000 340.000 340.000 345.000 345.000 350.000 350.000 350.000 355.000 355.000 355.000 360.000 360.000 360.000 365.000 367.500 370.000 370.000 370.000 372.500 375.000 380.000 380.000 380.000 380.000 385.000 385.000 385.000 390.000 390.000 390.000 395.000 395.000 395.000 400.000 400.000 400.000 405.000 405.000 405.000 405.000 410.000 410.000 410.000 415.000 415.000 415.000 415.000 415.000 420.000 420.000 420.000 420.000 425.000 425.000 425.000 426.667 428.333 430.000 435.000 430.000 435.000 440.000 445.000 445.000 447.500 450.000 450.000 455.000 455.000 460.000 460.000 460.000 465.000 468.333 471.667 475.000 478.333 481.667 485.000 485.000 490.000 495.000 500.000 505.000 510.000 515.000 525.000 530.000 535.000 543.518 553.119 564.023 576.515 590.970 607.888 627.959 652.154
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
48 48 48 45 0 48 0 0 0 0 0 45 0 0 0 51 51 48 0 48 54 51 0 57 57 54 0 0 0 0 57 54 57 60 60 54 60 60 57 57 0 57 54 0 60 54 0 60 60 60 0 51 60 0 63 63 63 63 63 63 63 66 60 63 66 63 0 66 63 66 66 63 48 57 0 69 57 66 54 60 69 69 63 66 66 63 66 69 63 69 66 66 69 69 63 69 69 63 63 66 63 60 63 63 66 60 63 0 66 57 63 0 63 0 0 63 57 60 0 0 45 51 0 51 54 48 54 45 54 54 54 0 51 0 45 0 51 48 48 0 48 48 0 48 48 48 48 51 0 45 0 0 0 0 45
</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="188">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
89.53 90.0 95.0 100.0 105.0 110.0 112.809 115.0 115.618 118.427 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 373.58 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.238 2.079 2.676 2.991 3.092 2.97 2.97 2.97 3.092 3.136 3.276 3.416 3.557 3.7 3.845 3.993 4.143 4.297 4.453 4.613 4.777 4.944 5.115 5.289 5.467 5.649 5.834 6.023 6.215 6.41 6.609 6.81 7.015 7.221 7.431 7.642 7.856 8.071 8.288 8.506 8.725 8.944 9.164 9.383 9.601 9.817 10.031 10.242 10.449 10.651 10.845 11.031 11.207 11.37 11.518 11.649 11.759 11.846 11.908 11.943 11.95 11.95 11.942 11.926 11.901 11.867 11.826 11.777 11.721 11.658 11.589 11.514 11.433 11.347 11.256 11.161 11.061 10.958 10.851 10.741 10.627 10.511 10.393 10.272 10.15 10.026 9.9 9.773 9.645 9.516 9.386 9.256 9.125 8.995 8.864 8.733 8.602 8.472 8.342 8.213 8.084 7.956 7.829 7.702 7.577 7.452 7.328 7.206 7.085 6.965 6.846 6.728 6.612 6.497 6.384 6.272 6.161 6.052 5.944 5.837 5.733 5.629 5.527 5.426 5.327 5.23 5.134 5.039 4.946 4.854 4.764 4.675 4.588 4.502 4.417 4.334 4.252 4.172 4.093 4.015 3.939 3.864 3.79 3.718 3.647 3.577 3.508 3.441 3.375 3.31 3.246 3.183 3.122 3.061 3.002 2.944 2.887 2.831 2.776 2.722 2.669 2.617 2.566 2.516 2.467 2.418 2.371 2.325 2.279 2.235 2.191 2.148 2.106 2.064 2.024 1.984 1.945 1.907 1.869 1.833 1.797 1.761 1.727 1.693 1.659 1.627 1.595

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.092" PeakHeight="110.0" Num="3" Error="0.0">
-30.271 12.814 -3.013
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.092" EndFrequency="11.95" PeakHeight="373.58" Num="5" zHalfNm="268.711" Error="3.381">
-221.035 -42.019 8.877 -1.615 0.639
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="8.427" Depth="0.122"/>
<TopsideChapman PeakHeight="373.58" PeakDensity="1771743.1" PeakScaleHeight="77.964" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
