<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-19 -078 23:10:00.000"
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 33 1 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 60% PACIFIC flags: Moderate F-spread, Multiple candidates for F2x cusp, Multiple candidates for F2o cusp, One of F2 cusps was derived from the other, Unidentified traces above foF2</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) 23:10:00</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">
FF202607803192310009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="5.900" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.757" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="16.267" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.950" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="2.950" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="6.300" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="380.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="380.000" 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="0.250" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="5.700" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="456.556" 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="0.354" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="2.950" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="2.950" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="403.765" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="367.610" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.958" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="55.770" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="5.488" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="27.674" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="72.930" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.000" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="60">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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" >
380.000 395.000 400.000 405.000 410.000 427.500 445.000 462.500 480.000 470.000 480.000 467.857 455.714 443.571 431.429 419.286 407.143 395.000 395.000 395.000 395.000 395.000 400.000 400.000 400.000 400.000 400.000 405.000 405.000 405.000 405.000 406.000 407.000 408.000 409.000 410.000 410.000 410.000 411.250 412.500 413.750 415.000 415.000 416.667 418.333 420.000 425.000 426.667 428.333 430.000 435.000 438.348 442.092 446.307 451.088 456.556 462.872 470.250 478.981 489.475
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
69 60 51 0 54 0 54 0 54 48 51 0 0 0 57 0 0 54 0 0 54 60 57 57 69 0 60 60 66 66 60 0 0 63 0 63 66 69 0 0 0 63 60 0 0 57 54 0 0 57 60 54 0 54 0 0 0 54 0 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-1.171875 -0.390625 -0.390625 -0.390625 -0.390625 0.390625 -0.390625 -1.171875 0.390625 2.734375 0.390625 -1.171875 -1.171875 0.390625 -0.390625 0.390625 -0.390625 0.390625 -1.953125 -1.171875 -0.390625 -1.171875 -0.390625 -1.171875 -1.171875 -1.171875 -0.390625 -1.171875 -1.171875 -1.171875 -1.171875 -0.390625 -1.171875 -1.171875 -0.390625 -1.171875 -1.171875 -1.171875 2.734375 -0.390625 -1.171875 -0.390625 -1.171875 0.390625 1.953125 -1.171875 -0.390625 -0.390625 0.390625 -1.171875 -1.171875 -1.171875 -1.171875 1.171875 1.953125 1.953125 0.390625 -1.171875 1.953125 -0.390625
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="136">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
93.502 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 140.0 144.375 145.0 150.0 155.0 160.0 165.0 170.0 175.0 178.749 180.0 185.0 190.0 195.0 200.0 205.0 210.0 213.124 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 403.765 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.234 0.307 0.343 0.354 0.351 0.344 0.33 0.311 0.283 0.246 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.206 0.228 0.25 0.273 0.295 0.318 0.34 0.354 0.366 0.404 0.458 0.535 0.632 0.74 0.847 0.951 1.053 1.153 1.253 1.352 1.453 1.555 1.659 1.765 1.874 1.987 2.103 2.224 2.35 2.481 2.618 2.762 2.914 3.075 3.245 3.426 3.619 3.826 4.049 4.289 4.547 4.823 5.113 5.405 5.669 5.853 5.9 5.899 5.872 5.813 5.726 5.616 5.486 5.34 5.182 5.014 4.84 4.661 4.48 4.298 4.116 3.937 3.761 3.589 3.421 3.258 3.1 2.948 2.801 2.66 2.525 2.396 2.272 2.154 2.041 1.934 1.832 1.735 1.642 1.554 1.471 1.392 1.317 1.246 1.179 1.115 1.055 0.997 0.943 0.892 0.843 0.797 0.754 0.713 0.674 0.637 0.602 0.569 0.538 0.508 0.481 0.454 0.429 0.406 0.384 0.363 0.343 0.324 0.306 0.289 0.274 0.259 0.244 0.231 0.218 0.206

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="0.354" PeakHeight="110.0" Num="3" Error="0.0">
-18.791 2.435 -0.142
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="0.354" EndFrequency="5.9" PeakHeight="403.765" Num="5" zHalfNm="367.61" Error="9.426">
-152.648 -57.917 26.123 -2.336 -3.863
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="103.124" Depth="0.154"/>
<TopsideChapman PeakHeight="403.765" PeakDensity="431885.84" PeakScaleHeight="27.674" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
