<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-16 -075 23:00:00.000"
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 55 1 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 20% PACIFIC flags: Moderate F-spread, Multiple candidates for F2x cusp, Multiple candidates for F2o cusp, F2 cusps do not match, Unidentified traces above foF2, 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" >
2026.03.16 (075) 23:00:00</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">
FF202607503162300009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="5.850" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.954" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="17.279" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.850" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="2.850" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="7.500" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="345.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="345.000" 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="0.400" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="5.850" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="432.060" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="0.354" 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="378.334" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="349.105" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="8.066" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="46.484" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="4.260" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="20.702" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="66.300" 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="61">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
345.000 352.500 360.000 366.250 372.500 378.750 385.000 388.750 392.500 396.250 400.000 400.682 401.364 402.045 402.727 403.409 404.091 404.773 405.455 406.136 406.818 407.500 408.182 408.864 409.545 410.227 410.909 411.591 412.273 412.955 413.636 414.318 415.000 410.000 405.000 410.000 415.000 410.000 430.000 436.000 442.000 448.000 454.000 460.000 450.000 440.000 435.938 431.875 427.813 423.750 419.688 415.625 410.000 410.000 415.000 420.000 420.000 420.880 422.303 425.000 432.060
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
57 0 54 0 0 0 0 0 0 0 60 0 0 0 0 0 0 0 54 0 51 0 0 0 0 0 0 0 0 57 0 0 54 51 54 54 51 48 54 0 0 0 0 51 51 0 51 54 0 0 0 0 72 66 66 60 54 63 69 60 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-0.390625 0.390625 0.390625 0.390625 1.171875 -0.390625 -0.390625 1.171875 0.390625 0.390625 -0.390625 0.390625 0.390625 -1.171875 -1.171875 0.390625 -1.171875 1.171875 -0.390625 1.953125 -1.171875 -1.171875 -0.390625 0.390625 -2.734375 0.390625 -1.171875 -0.390625 0.390625 0.390625 -0.390625 2.734375 -0.390625 -0.390625 -0.390625 -0.390625 1.171875 1.171875 -0.390625 -2.734375 0.390625 -1.171875 -0.390625 1.171875 0.390625 1.171875 1.953125 0.390625 1.171875 -0.390625 1.953125 0.390625 -1.171875 -1.171875 -1.171875 -0.390625 -1.171875 -0.390625 -1.171875 -1.171875 1.171875
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="114">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
93.502 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 140.0 143.941 145.0 150.0 155.0 160.0 165.0 170.0 175.0 177.881 180.0 185.0 190.0 195.0 200.0 205.0 210.0 211.822 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 378.334 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.234 0.307 0.343 0.354 0.351 0.343 0.33 0.309 0.281 0.242 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.21 0.232 0.255 0.278 0.3 0.323 0.346 0.354 0.401 0.482 0.573 0.675 0.786 0.904 1.027 1.153 1.282 1.412 1.543 1.675 1.808 1.943 2.08 2.218 2.358 2.501 2.647 2.796 2.948 3.105 3.266 3.433 3.605 3.785 3.974 4.173 4.385 4.615 4.867 5.157 5.517 5.85 5.846 5.795 5.69 5.543 5.363 5.157 4.934 4.701 4.461 4.22 3.981 3.746 3.518 3.298 3.087 2.886 2.694 2.513 2.343 2.182 2.031 1.89 1.757 1.633 1.518 1.41 1.309 1.216 1.129 1.048 0.972 0.902 0.837 0.777 0.721 0.668 0.62 0.575 0.533 0.495 0.459 0.426 0.395 0.366 0.34 0.315 0.292 0.271 0.251 0.233 0.216 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="5.85" PeakHeight="378.334" Num="5" zHalfNm="349.105" Error="3.121">
-128.712 -66.058 39.336 -13.268 2.19
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="101.822" Depth="0.154"/>
<TopsideChapman PeakHeight="378.334" PeakDensity="424596.78" PeakScaleHeight="20.702" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
