<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-28 -087 09:10:00.000"
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 11 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 95% PACIFIC flags: Multiple candidates for F2x cusp</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" >
2026.03.28 (087) 09:10:00</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">
FF202608703280910009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="5.900" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="3.277" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="19.337" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.350" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="2.350" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="6.250" 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="0.100" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="5.550" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="325.808" 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="1.318" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="2.850" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="2.850" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="281.684" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="221.321" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="4.530" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="87.491" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="8.980" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="49.161" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="67.240" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="4.270" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="72">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
2.35 2.4 2.45 2.5 2.55 2.6 2.65 2.7 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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
260.000 255.000 255.000 255.000 250.000 250.000 250.000 250.000 250.000 250.000 245.000 245.000 250.000 250.000 250.000 250.000 250.000 250.000 250.000 250.000 250.000 250.000 250.000 250.000 255.000 250.000 250.000 250.000 250.000 260.000 260.000 265.000 255.000 260.000 262.500 265.000 260.000 262.500 265.000 265.000 265.000 267.500 270.000 270.000 275.000 275.000 275.000 280.000 280.000 280.000 280.000 280.000 284.000 288.000 292.000 296.000 300.000 300.000 300.000 300.000 305.000 315.000 315.000 319.899 325.808 333.072 342.220 354.093 370.122 392.953 428.078 489.092
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
60 60 0 66 66 0 66 66 69 72 63 63 63 63 69 69 69 72 66 72 72 66 72 72 75 66 69 63 60 66 57 60 60 66 0 51 72 0 72 60 72 0 69 69 63 0 63 60 48 63 69 0 0 0 51 0 48 60 63 60 66 63 66 66 69 66 66 66 69 63 57 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 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 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 1.171875 1.171875 1.171875 1.171875 1.171875 0.390625 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.953125 1.953125 2.734375
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="165">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
90.028 95.0 100.0 105.0 110.0 115.0 120.0 122.716 125.0 130.0 135.0 135.431 140.0 145.0 148.147 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 281.684 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.88 1.142 1.276 1.318 1.295 1.223 1.161 1.161 1.161 1.161 1.161 1.217 1.279 1.318 1.385 1.54 1.677 1.81 1.941 2.076 2.216 2.364 2.524 2.699 2.895 3.12 3.383 3.697 4.068 4.461 4.81 5.087 5.298 5.462 5.589 5.687 5.764 5.821 5.862 5.888 5.899 5.9 5.897 5.884 5.86 5.826 5.783 5.732 5.674 5.608 5.536 5.459 5.377 5.291 5.201 5.108 5.013 4.915 4.816 4.716 4.614 4.512 4.41 4.307 4.205 4.103 4.002 3.902 3.803 3.705 3.608 3.512 3.418 3.326 3.235 3.146 3.059 2.973 2.889 2.807 2.727 2.649 2.572 2.498 2.425 2.354 2.285 2.217 2.151 2.087 2.025 1.964 1.905 1.848 1.792 1.738 1.686 1.634 1.585 1.536 1.489 1.444 1.4 1.357 1.315 1.275 1.236 1.198 1.161 1.125 1.09 1.056 1.024 0.992 0.961 0.932 0.903 0.875 0.847 0.821 0.796 0.771 0.747 0.724 0.701 0.679 0.658 0.638 0.618 0.599 0.58 0.562 0.544 0.527 0.511 0.495 0.48 0.465 0.45 0.436 0.422 0.409 0.396 0.384 0.372 0.36 0.349 0.338 0.328 0.317 0.308 0.298 0.289 0.28 0.271 0.262 0.254 0.246 0.239 0.231 0.224 0.217 0.21 0.203

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="1.318" PeakHeight="110.0" Num="3" Error="0.0">
-27.648 9.303 -1.627
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="1.318" EndFrequency="5.9" PeakHeight="281.684" Num="5" zHalfNm="221.321" Error="3.232">
-136.755 13.243 -18.66 9.801 -1.166
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="38.147" Depth="0.157"/>
<TopsideChapman PeakHeight="281.684" PeakDensity="431885.84" PeakScaleHeight="49.161" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
