<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-01 -060 23:50:00.000"
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 44 1 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 50% PACIFIC flags: Moderate F-spread, F2o cusp not found, 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" >
2026.03.01 (060) 23:50:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.15" 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">
FF202606003012350009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="8.400" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.843" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="23.884" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="4.050" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="4.050" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="6.200" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="405.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="405.000" 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="8.200" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="441.667" 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="6.550" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="6.550" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="393.830" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="360.890" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.590" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="52.016" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="9.868" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="24.211" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="66.650" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.040" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="88">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
420.000 417.500 415.000 415.000 415.000 415.000 415.000 417.500 420.000 420.313 420.625 420.938 421.250 421.563 421.875 422.188 422.500 422.813 423.125 423.438 423.750 424.063 424.375 424.688 425.000 425.000 425.000 420.000 420.000 420.000 419.286 418.571 417.857 417.143 416.429 415.714 415.000 414.286 413.571 412.857 412.143 411.429 410.714 410.000 409.286 408.571 407.857 407.143 406.429 405.714 405.000 410.000 415.000 420.000 421.250 422.500 423.750 425.000 425.000 425.000 425.000 425.000 425.000 424.000 423.000 422.000 421.000 420.000 417.500 415.000 415.000 415.000 415.000 417.500 420.000 420.000 420.000 422.500 425.000 425.000 430.000 435.000 438.333 441.667 445.000 455.000 465.000 475.000
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
48 48 60 54 54 0 54 57 57 0 0 0 51 0 0 0 0 0 0 51 0 51 0 0 54 51 54 54 0 54 0 0 54 0 57 0 0 0 0 0 0 0 0 0 0 48 0 0 54 54 48 0 54 57 0 0 0 60 60 57 57 57 54 0 0 0 0 54 0 54 51 57 54 54 57 57 57 54 54 57 57 51 54 51 51 48 51 48
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
1.953125 0.390625 -1.171875 -0.390625 -1.171875 -1.171875 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 0.390625 0.390625 1.171875 -1.171875 -1.953125 0.390625 -0.390625 -1.953125 -1.171875 -1.171875 1.953125 -0.390625 0.390625 -1.171875 -0.390625 0.390625 -0.390625 -1.171875 0.390625 2.734375 -0.390625 1.953125 -0.390625 -0.390625 -0.390625 -0.390625 -2.734375 -1.953125 1.953125 -1.171875 -1.953125 -2.734375 -1.953125 1.953125 -1.171875 0.390625 -1.953125 -0.390625 -0.390625 -0.390625 2.734375 -0.390625 -0.390625 1.171875 -1.171875 -0.390625 0.390625 -1.171875 0.390625 -0.390625 -0.390625 -0.390625 -1.171875 -0.390625 2.734375 -1.171875 2.734375 -1.171875 -1.171875 -1.953125 -1.171875 -0.390625 -2.734375 -1.171875 -1.171875 -1.171875 2.734375 0.390625 -0.390625 1.171875 1.171875 -1.953125 1.171875 0.390625 2.734375 2.734375 -1.171875
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="131">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
93.502 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 140.0 145.0 145.388 150.0 155.0 160.0 165.0 170.0 175.0 180.0 180.777 185.0 190.0 195.0 200.0 205.0 210.0 215.0 216.165 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 393.83 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.234 0.307 0.343 0.354 0.352 0.344 0.332 0.313 0.288 0.253 0.205 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.218 0.24 0.262 0.284 0.305 0.327 0.349 0.354 0.401 0.482 0.588 0.72 0.868 1.026 1.188 1.352 1.518 1.687 1.858 2.031 2.207 2.387 2.571 2.76 2.953 3.152 3.356 3.567 3.784 4.01 4.244 4.487 4.74 5.005 5.282 5.574 5.883 6.211 6.561 6.938 7.347 7.788 8.226 8.4 8.398 8.35 8.243 8.086 7.889 7.66 7.406 7.134 6.849 6.557 6.261 5.965 5.672 5.385 5.104 4.831 4.568 4.314 4.071 3.839 3.617 3.406 3.206 3.016 2.836 2.666 2.505 2.353 2.21 2.075 1.948 1.829 1.716 1.611 1.511 1.418 1.33 1.248 1.17 1.098 1.029 0.965 0.905 0.849 0.796 0.746 0.7 0.656 0.615 0.577 0.541 0.507 0.476 0.446 0.418 0.392 0.367 0.344 0.323 0.303 0.284 0.266 0.249 0.234 0.219 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="8.4" PeakHeight="393.83" Num="5" zHalfNm="360.89" Error="4.335">
-146.002 -56.274 35.126 -11.013 0.498
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="106.165" Depth="0.154"/>
<TopsideChapman PeakHeight="393.83" PeakDensity="875434.25" PeakScaleHeight="24.211" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
