<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-04-06 -096 01:50:00.000"
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 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, Trace overlaps while constructing baseline</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" >
2026.04.06 (096) 01:50:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.19" 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">
FF202609604060150009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="7.950" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.878" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="22.877" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="3.050" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="3.050" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="8.300" 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="0.050" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="7.800" 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="0.354" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="3.800" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="3.800" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="413.469" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="384.801" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="6.590" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="46.228" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="8.022" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="21.300" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="68.060" 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="99">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
415.000 410.000 405.000 400.000 395.000 393.636 392.273 390.909 389.545 388.182 386.818 385.455 384.091 382.727 381.364 380.000 380.000 384.000 388.000 392.000 396.000 400.000 402.500 405.000 400.000 395.000 390.000 395.000 400.000 405.000 412.000 419.000 426.000 433.000 440.000 445.000 450.000 455.000 460.000 463.333 466.667 470.000 473.333 476.667 480.000 478.750 477.500 476.250 475.000 472.000 469.000 466.000 463.000 460.000 460.000 460.000 460.000 462.000 464.000 466.000 468.000 470.000 465.000 452.500 440.000 445.000 445.000 445.000 445.000 445.000 445.000 442.500 440.000 445.000 447.500 450.000 449.167 448.333 447.500 446.667 445.833 445.000 444.167 443.333 442.500 441.667 440.833 440.000 442.500 445.000 446.250 447.500 448.750 450.000 458.333 435.000 448.832 470.000 506.443
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
48 0 48 0 0 0 0 0 0 0 0 0 0 0 0 0 51 0 0 0 0 48 0 0 0 0 0 0 0 0 0 51 0 0 48 0 0 0 48 0 0 0 0 0 51 0 0 0 51 0 0 0 0 48 0 0 51 54 0 51 0 48 51 54 51 51 0 0 51 0 48 0 48 45 0 54 0 0 0 0 0 0 48 0 0 0 0 48 0 48 0 0 0 48 0 45 0 45 0
</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 1.171875 0.390625 1.171875 1.171875 1.171875 0.390625 0.390625 1.171875 0.390625 0.390625 1.171875 1.171875 0.390625 0.390625 0.390625 0.390625 1.171875 1.171875 -0.390625 0.390625 0.390625 -1.171875 0.390625 1.171875 0.390625 -0.390625 1.171875 0.390625 2.734375 -1.171875 1.171875 0.390625 0.390625 0.390625 -1.171875 -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 1.171875 -0.390625 -0.390625 -0.390625 0.390625 -1.171875 -0.390625 -0.390625 -0.390625 -0.390625 0.390625 -2.734375 1.953125 0.390625 1.171875 -0.390625 -0.390625 0.390625 -0.390625 1.171875 0.390625 1.171875 1.953125 1.953125 1.171875 1.171875 1.171875 0.390625 1.171875 1.171875 -2.734375 -1.953125 0.390625 1.171875 0.390625 1.953125 1.171875 0.390625 0.390625 1.171875 -0.390625 0.390625 0.390625 -1.171875
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="126">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
93.502 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 140.0 145.0 147.439 150.0 155.0 160.0 165.0 170.0 175.0 180.0 184.877 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 222.316 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 413.469 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.234 0.307 0.343 0.354 0.352 0.345 0.334 0.318 0.295 0.266 0.225 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.201 0.221 0.242 0.262 0.283 0.303 0.324 0.344 0.354 0.391 0.474 0.573 0.681 0.793 0.907 1.023 1.141 1.26 1.381 1.505 1.631 1.76 1.893 2.029 2.169 2.313 2.462 2.616 2.775 2.94 3.111 3.289 3.474 3.667 3.869 4.081 4.303 4.538 4.786 5.049 5.331 5.634 5.963 6.323 6.725 7.182 7.702 7.95 7.946 7.882 7.749 7.56 7.326 7.06 6.769 6.463 6.147 5.829 5.512 5.2 4.895 4.6 4.316 4.045 3.786 3.54 3.308 3.088 2.881 2.687 2.504 2.333 2.173 2.023 1.883 1.752 1.63 1.517 1.411 1.312 1.22 1.134 1.055 0.981 0.912 0.847 0.788 0.732 0.681 0.632 0.588 0.546 0.508 0.472 0.439 0.408 0.379 0.352 0.327 0.304 0.283 0.263 0.244 0.227 0.211

</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="7.95" PeakHeight="413.469" Num="5" zHalfNm="384.801" Error="5.319">
-147.727 -73.542 38.183 -7.791 -0.276
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="112.316" Depth="0.154"/>
<TopsideChapman PeakHeight="413.469" PeakDensity="784150.1" PeakScaleHeight="21.3" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
