<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-01-26 -026 00:40:00.000"
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: 40% 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, 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" >
2026.01.26 (026) 00:40:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.12" 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">
FF202602601260040009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="6.200" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.909" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="18.038" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="3.250" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="3.250" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="6.650" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="385.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="385.000" 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="6.150" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="435.683" 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="5.050" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="5.050" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="386.142" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="358.135" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="5.270" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="44.804" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="4.704" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="20.443" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="65.070" 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" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
400.000 395.000 392.500 390.000 415.000 415.000 410.000 425.000 427.143 429.286 431.429 433.571 435.714 437.857 440.000 442.143 444.286 446.429 448.571 450.714 452.857 455.000 435.000 432.500 430.000 425.000 421.364 417.727 414.091 410.455 406.818 403.182 399.545 395.909 392.273 388.636 385.000 385.000 390.000 390.000 390.000 395.000 396.667 415.000 415.251 415.533 415.852 416.216 416.636 417.125 417.703 418.394 419.238 420.289 421.636 423.424 425.912 429.609 435.683 447.510
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
57 54 0 51 57 57 54 54 0 0 0 0 0 0 48 0 0 0 0 0 0 54 54 0 54 51 0 0 57 0 54 0 54 0 0 0 0 51 51 0 57 54 0 51 54 54 51 0 57 0 51 57 54 0 0 0 0 51 0 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
1.953125 -0.390625 -1.171875 1.953125 -0.390625 -1.171875 1.171875 -1.953125 -1.953125 -0.390625 -1.953125 1.953125 -2.734375 -1.953125 -2.734375 1.953125 -0.390625 -1.171875 1.953125 1.953125 -1.953125 -0.390625 -2.734375 -0.390625 -0.390625 -0.390625 -1.953125 -1.171875 -1.953125 1.171875 -1.953125 -1.171875 -1.171875 -1.953125 1.953125 1.953125 -1.171875 -0.390625 1.953125 2.734375 -1.171875 -1.953125 1.953125 -0.390625 -1.171875 -2.734375 -0.390625 0.390625 -1.171875 1.953125 -2.734375 -0.390625 -1.171875 0.390625 -1.171875 -0.390625 -1.171875 -2.734375 2.734375 -2.734375
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="115">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
93.502 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 140.0 145.0 146.159 150.0 155.0 160.0 165.0 170.0 175.0 180.0 182.318 185.0 190.0 195.0 200.0 205.0 210.0 215.0 218.477 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 386.142 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0
</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 0.333 0.315 0.291 0.258 0.213 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.211 0.233 0.254 0.275 0.297 0.318 0.339 0.354 0.367 0.418 0.493 0.598 0.728 0.867 1.005 1.14 1.273 1.404 1.534 1.664 1.795 1.927 2.061 2.198 2.337 2.48 2.627 2.779 2.935 3.097 3.265 3.441 3.625 3.818 4.022 4.24 4.473 4.726 5.005 5.32 5.691 6.144 6.2 6.179 6.097 5.962 5.786 5.578 5.347 5.101 4.846 4.587 4.329 4.075 3.827 3.587 3.357 3.137 2.928 2.73 2.543 2.367 2.201 2.046 1.901 1.766 1.64 1.522 1.412 1.31 1.215 1.127 1.045 0.969 0.898 0.832 0.771 0.715 0.663 0.614 0.569 0.527 0.488 0.453 0.419 0.389 0.36 0.334 0.309 0.286 0.265 0.246 0.228 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="6.2" PeakHeight="386.142" Num="5" zHalfNm="358.135" Error="6.102">
-129.404 -63.977 37.049 -10.702 -0.631
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="108.477" Depth="0.154"/>
<TopsideChapman PeakHeight="386.142" PeakDensity="476923.06" PeakScaleHeight="20.443" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
