<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-05 -064 02:00:00.000"
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" >
2026.03.05 (064) 02:00:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.16" 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">
FF202606403050200009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="10.200" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="3.039" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="31.001" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.550" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="2.550" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="10.550" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="335.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="335.000" 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="0.550" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="10.050" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="400.072" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="0.354" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="2.550" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="2.550" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="367.699" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="346.928" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="6.427" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="32.512" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="9.561" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="16.034" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="45.570" 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="154">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
335.000 337.500 340.000 345.000 360.000 363.333 366.667 370.000 380.000 385.000 385.000 385.000 385.000 380.000 375.000 370.000 370.000 368.333 366.667 365.000 360.000 355.000 350.000 345.000 340.000 340.000 340.000 340.000 340.000 347.500 355.000 362.500 370.000 370.000 365.000 360.000 355.000 355.000 355.000 355.000 355.000 355.000 355.000 355.000 355.000 362.500 370.000 365.000 360.000 355.000 355.000 355.000 355.000 355.000 355.000 355.000 355.000 355.000 355.000 355.000 350.000 350.000 350.000 351.875 353.750 355.625 357.500 359.375 361.250 363.125 365.000 370.000 370.000 370.000 370.000 365.000 362.500 360.000 357.500 355.000 355.000 355.000 355.000 355.000 355.000 355.000 355.000 355.000 350.000 352.500 355.000 355.000 360.000 360.000 370.000 371.667 373.333 375.000 382.500 390.000 395.000 400.000 400.000 402.500 405.000 400.000 395.000 395.000 395.000 395.000 395.000 395.000 392.500 390.000 385.000 382.500 380.000 377.778 375.556 373.333 371.111 368.889 366.667 364.444 362.222 360.000 410.000 417.500 425.000 435.000 440.000 428.000 416.000 404.000 392.000 392.104 392.219 392.349 392.494 392.659 392.848 393.066 393.320 393.622 393.984 394.428 394.984 395.702 396.664 398.020 400.072 403.544 410.692 433.909
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
57 66 63 63 57 0 0 63 57 54 54 0 51 54 0 54 60 0 0 54 60 66 0 57 63 63 63 57 57 0 0 54 57 57 60 66 72 72 0 66 63 63 0 0 72 0 57 57 57 66 0 69 63 0 57 69 0 69 69 69 63 66 60 0 60 0 0 0 0 60 54 60 60 57 54 57 0 0 0 69 69 66 66 63 63 66 0 63 60 0 66 63 57 60 63 0 0 57 0 57 57 57 60 0 57 60 60 57 60 63 54 60 54 54 54 54 60 0 60 51 0 57 0 0 0 63 57 48 54 51 54 51 54 57 0 57 0 57 0 0 57 0 51 0 0 0 0 51 0 48 0 0 0 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-0.390625 1.171875 0.390625 0.390625 -0.390625 -1.171875 0.390625 -1.171875 -0.390625 1.171875 -0.390625 -1.171875 1.171875 -0.390625 -0.390625 -0.390625 -0.390625 1.953125 0.390625 1.171875 -0.390625 -1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 -1.171875 -1.171875 -0.390625 -0.390625 -0.390625 1.953125 1.171875 -1.171875 -1.171875 1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -2.734375 -0.390625 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 2.734375 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.953125 1.171875 -1.171875 1.171875 1.171875 -1.171875 -1.171875 1.953125 -1.171875 1.171875 -0.390625 -1.171875 1.171875 1.171875 1.171875 1.171875 -1.953125 -1.953125 -1.171875 -1.171875 -1.953125 -1.953125 -1.953125 -1.171875 -1.171875 -1.953125 -1.953125 -1.953125 -1.953125 -1.171875 -1.953125 -1.171875 -0.390625 -2.734375 1.171875 -2.734375 -0.390625 0.390625 -0.390625 0.390625 1.953125 1.171875 -0.390625 1.953125 1.953125 0.390625 0.390625 1.953125 0.390625 0.390625 0.390625 1.953125 0.390625 -1.171875 -1.953125 -1.171875 -1.171875 -1.171875 -1.171875 -1.953125 -1.953125 -2.734375 -1.953125 0.390625 1.953125 1.171875 1.171875 1.171875 1.171875 0.390625 1.171875 1.953125 -0.390625 -2.734375 0.390625 -0.390625 -2.734375 0.390625 -1.171875 -0.390625 1.953125 -0.390625 -0.390625 0.390625 -0.390625 -0.390625 -2.734375 -2.734375 -2.734375 1.953125 -2.734375
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="106">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
93.502 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 140.0 145.0 147.404 150.0 155.0 160.0 165.0 170.0 175.0 180.0 184.807 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 222.211 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 367.699 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0
</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 0.265 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 0.263 0.283 0.304 0.324 0.345 0.354 0.418 0.543 0.672 0.804 0.938 1.077 1.222 1.373 1.532 1.701 1.88 2.071 2.276 2.496 2.733 2.99 3.269 3.574 3.909 4.279 4.69 5.15 5.669 6.257 6.929 7.695 8.551 9.43 10.088 10.2 10.18 10.013 9.709 9.304 8.83 8.313 7.775 7.232 6.698 6.18 5.686 5.218 4.778 4.369 3.988 3.637 3.314 3.017 2.745 2.496 2.269 2.062 1.873 1.701 1.544 1.402 1.273 1.155 1.048 0.951 0.863 0.783 0.711 0.645 0.585 0.531 0.481 0.437 0.396 0.359 0.326 0.296 0.268 0.243 0.221 0.2

</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="10.2" PeakHeight="367.699" Num="5" zHalfNm="346.928" Error="5.662">
-111.672 -51.151 17.172 1.655 -1.492
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="112.211" Depth="0.154"/>
<TopsideChapman PeakHeight="367.699" PeakDensity="1290818.9" PeakScaleHeight="16.034" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
