<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-19 -078 20:30:00.000"
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 33 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 65% PACIFIC flags: Multiple candidates for F2x cusp, F2 cusps do not match</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" >
2026.03.19 (078) 20:30:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.17" 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">
FF202607803192030009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="11.650" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.769" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="32.263" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.750" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="2.750" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="11.550" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="245.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="245.000" 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="11.000" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="435.000" 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="1.844" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="2.750" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="2.750" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="346.216" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="277.706" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="9.629" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="96.315" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="36.987" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="49.955" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="108.690" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.470" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="179">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
2.75 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 11.25 11.3 11.35 11.4 11.45 11.5 11.55 11.6 11.65
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
245.000 245.000 250.000 250.000 250.000 250.833 251.667 252.500 253.333 254.167 255.000 255.000 255.000 255.000 255.000 255.000 255.000 255.000 260.000 260.000 260.000 260.000 260.000 260.000 261.250 262.500 263.750 265.000 265.000 266.250 267.500 268.750 270.000 275.000 275.000 275.000 275.000 275.000 275.000 275.000 275.000 277.500 280.000 285.000 287.000 289.000 291.000 293.000 295.000 295.000 292.500 290.000 290.000 292.500 295.000 295.000 295.000 295.000 295.000 297.500 300.000 300.000 300.000 305.000 305.000 305.000 306.250 307.500 308.750 310.000 311.000 312.000 313.000 314.000 315.000 316.667 318.333 320.000 320.000 320.000 320.000 325.000 325.000 325.000 325.000 325.000 330.000 335.000 335.000 335.000 335.000 335.000 337.500 340.000 340.000 345.000 345.000 345.000 345.000 347.500 350.000 350.000 350.000 350.000 350.000 350.000 350.000 350.000 355.000 357.500 360.000 360.000 360.000 360.000 360.000 360.000 360.000 365.000 365.000 365.000 365.000 365.000 370.000 370.000 370.000 370.000 371.667 373.333 375.000 380.000 380.000 380.000 380.000 380.000 380.000 385.000 385.000 385.000 390.000 390.000 390.000 390.000 390.000 395.000 395.000 400.000 400.000 400.000 400.000 400.000 405.000 405.000 405.000 405.000 410.000 415.000 415.000 417.500 420.000 425.000 425.000 430.000 430.000 430.000 432.500 435.000 445.000 447.500 450.000 452.500 455.000 460.033 465.554 471.637 478.373 485.871 494.270 503.743 514.508
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
48 54 57 54 54 0 57 0 0 0 54 54 0 63 57 63 57 51 63 0 54 0 57 48 0 57 0 54 57 0 0 0 66 0 0 72 0 69 0 63 54 0 63 60 0 0 0 0 45 48 0 63 0 0 45 0 0 0 0 0 63 54 69 66 66 63 0 0 0 66 0 0 51 0 66 0 0 63 69 69 72 69 72 75 66 75 75 63 66 66 69 69 0 66 69 54 0 66 63 48 57 60 63 45 75 75 63 66 72 0 60 63 60 63 63 66 63 66 66 69 72 72 69 69 69 66 0 0 69 57 0 60 66 69 66 0 60 66 54 0 66 0 66 63 63 51 57 60 63 63 60 63 60 57 54 60 60 54 57 51 57 54 54 54 0 45 51 0 0 0 48 45 42 48 48 48 51 0 51
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -1.171875 -0.390625 1.171875 2.734375 2.734375 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -2.734375 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 1.171875 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -2.734375 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 0.390625 0.390625 -0.390625 -0.390625 -0.390625 0.390625 -0.390625 -0.390625 0.390625 -0.390625 0.390625 -0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 -0.390625 0.390625 -0.390625 0.390625 0.390625 0.390625 -0.390625 -0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625
</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" >
89.808 90.0 95.0 100.0 105.0 110.0 115.0 119.094 120.0 125.0 128.189 130.0 135.0 137.283 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 346.216 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.217 1.235 1.597 1.785 1.844 1.804 1.708 1.708 1.708 1.708 1.735 1.81 1.844 1.91 2.031 2.153 2.278 2.408 2.544 2.688 2.841 3.003 3.176 3.362 3.56 3.772 3.997 4.237 4.49 4.756 5.033 5.319 5.612 5.911 6.215 6.522 6.83 7.14 7.45 7.76 8.07 8.38 8.688 8.996 9.302 9.605 9.906 10.202 10.49 10.767 11.026 11.259 11.451 11.586 11.647 11.65 11.644 11.616 11.568 11.502 11.418 11.319 11.205 11.077 10.939 10.789 10.631 10.464 10.29 10.11 9.925 9.736 9.544 9.349 9.152 8.954 8.755 8.556 8.357 8.159 7.962 7.767 7.573 7.382 7.193 7.007 6.823 6.642 6.464 6.29 6.119 5.951 5.786 5.625 5.467 5.313 5.163 5.016 4.872 4.732 4.595 4.462 4.332 4.205 4.082 3.962 3.845 3.732 3.621 3.513 3.409 3.307 3.208 3.112 3.019 2.928 2.84 2.754 2.671 2.59 2.512 2.436 2.362 2.291 2.221 2.153 2.088 2.024 1.963 1.903 1.845 1.789 1.734 1.681 1.63 1.58 1.531 1.485 1.439 1.395 1.352 1.311 1.271 1.232 1.194 1.157 1.122 1.087 1.054 1.022 0.99 0.96 0.93 0.902 0.874 0.847 0.821 0.796 0.771 0.748 0.725 0.702 0.681 0.66 0.64 0.62 0.601 0.582 0.564 0.547 0.53 0.514 0.498 0.483 0.468 0.454 0.44 0.426 0.413 0.4 0.388 0.376 0.364 0.353 0.342 0.332 0.322

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="1.844" PeakHeight="110.0" Num="3" Error="0.0">
-28.811 10.776 -2.157
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="1.844" EndFrequency="11.65" PeakHeight="346.216" Num="5" zHalfNm="277.706" Error="3.844">
-173.747 -41.747 10.436 -6.376 2.501
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="27.283" Depth="0.136"/>
<TopsideChapman PeakHeight="346.216" PeakDensity="1683902.0" PeakScaleHeight="49.955" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
