<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-26 -085 19:30:00.000"
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 11 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 90% PACIFIC flags: 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" >
2026.03.26 (085) 19:30:00</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">
FF202608503261930009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="11.350" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.535" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="28.767" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="3.250" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="3.250" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="11.650" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="235.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="235.000" 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="10.350" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="475.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Custom Name="dlt foF2" Val="0.000" Description="Adjustment to the scaled foF2 during profile inversion" Units="MHz" />
<Modeled Name="foEp" Val="2.504" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="3.300" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="3.300" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="375.492" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="272.938" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="9.684" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="139.425" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="51.122" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="73.606" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="157.490" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.550" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="163">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
240.000 235.000 235.000 235.000 235.000 235.000 235.000 240.000 241.667 243.333 245.000 245.000 246.667 248.333 250.000 251.667 253.333 255.000 255.000 257.500 260.000 262.500 265.000 266.667 268.333 270.000 265.000 268.000 271.000 274.000 277.000 280.000 280.000 280.000 280.000 280.000 282.500 285.000 288.333 291.667 295.000 295.000 295.000 295.000 295.000 295.000 295.000 297.500 300.000 300.000 300.000 305.000 305.000 305.000 310.000 310.000 310.000 312.500 315.000 315.000 315.000 317.500 320.000 320.000 322.500 325.000 330.000 330.000 330.000 330.000 332.500 335.000 335.000 335.000 340.000 340.000 345.000 345.000 350.000 350.000 350.000 350.000 355.000 355.000 360.000 360.000 360.000 360.000 365.000 365.000 370.000 370.000 370.000 375.000 375.000 380.000 380.000 380.000 385.000 385.000 390.000 390.000 395.000 395.000 400.000 400.000 400.000 405.000 405.000 410.000 410.000 410.000 415.000 420.000 420.000 425.000 425.000 425.000 425.000 430.000 430.000 435.000 435.000 440.000 440.000 440.000 440.000 445.000 445.000 450.000 450.000 450.000 455.000 455.000 460.000 465.000 465.000 470.000 470.000 470.000 475.000 475.000 475.000 485.000 487.500 490.000 495.000 495.000 500.000 505.000 510.000 515.000 520.000 525.000 531.452 538.613 546.607 555.588 565.751 577.345 590.697 606.237 624.553
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
60 57 57 0 54 54 54 54 0 0 51 54 0 0 0 0 0 51 57 0 60 0 60 0 0 0 45 0 0 57 0 57 0 60 60 57 0 60 0 0 0 0 0 60 63 63 60 0 63 66 63 66 66 66 63 63 66 57 63 66 66 0 63 66 60 66 51 0 63 66 0 66 69 69 66 69 60 66 57 63 69 69 66 69 60 69 72 72 72 72 69 72 75 69 75 69 72 69 72 72 69 72 66 69 63 69 66 66 69 66 69 66 69 60 66 57 63 66 69 66 63 60 63 54 60 66 66 63 66 60 63 66 63 63 63 54 60 54 60 60 60 57 60 60 54 66 69 63 60 57 57 54 54 51 51 54 51 51 51 48 51 48 42
</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" >
89.639 90.0 95.0 100.0 105.0 110.0 115.0 115.562 120.0 121.123 125.0 126.685 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 375.492 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.23 1.681 2.168 2.423 2.504 2.404 2.38 2.38 2.38 2.466 2.504 2.584 2.705 2.827 2.951 3.08 3.213 3.353 3.5 3.654 3.817 3.99 4.172 4.363 4.564 4.773 4.99 5.212 5.439 5.669 5.9 6.131 6.361 6.589 6.815 7.038 7.259 7.476 7.691 7.902 8.112 8.318 8.522 8.724 8.923 9.121 9.316 9.509 9.699 9.887 10.072 10.254 10.43 10.601 10.764 10.916 11.054 11.173 11.265 11.326 11.35 11.35 11.346 11.332 11.309 11.277 11.236 11.187 11.131 11.067 10.997 10.92 10.838 10.75 10.657 10.559 10.457 10.351 10.242 10.129 10.013 9.894 9.773 9.65 9.525 9.399 9.271 9.142 9.012 8.882 8.751 8.619 8.488 8.356 8.224 8.093 7.962 7.832 7.702 7.573 7.445 7.318 7.191 7.066 6.942 6.819 6.698 6.577 6.458 6.34 6.224 6.109 5.996 5.884 5.774 5.665 5.558 5.452 5.348 5.245 5.144 5.045 4.947 4.85 4.756 4.663 4.571 4.481 4.392 4.305 4.22 4.136 4.053 3.972 3.892 3.814 3.738 3.662 3.588 3.516 3.444 3.375 3.306 3.239 3.173 3.108 3.044 2.982 2.921 2.861 2.803 2.745 2.689 2.633 2.579 2.526 2.474 2.423 2.373 2.324 2.276 2.228 2.182 2.137 2.093 2.049 2.007 1.965 1.924 1.884 1.845 1.807 1.769 1.732 1.696 1.661 1.626 1.592 1.559 1.527 1.495 1.464 1.433 1.403 1.374 1.345 1.317

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="2.504" PeakHeight="110.0" Num="3" Error="0.0">
-29.72 12.018 -2.659
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="2.504" EndFrequency="11.35" PeakHeight="375.492" Num="5" zHalfNm="272.938" Error="4.157">
-217.293 -40.869 16.301 -10.207 3.261
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="16.685" Depth="0.124"/>
<TopsideChapman PeakHeight="375.492" PeakDensity="1598294.0" PeakScaleHeight="73.606" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
