<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-02-12 -043 08:00:00.000"
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 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 65% PACIFIC flags: F2x cusp not found, Multiple candidates for F2o cusp, One of F2 cusps was derived from the other</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" >
2026.02.12 (043) 08:00:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.14" 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">
FF202604302120800009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="4.300" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="3.287" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="14.132" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="1.850" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="1.850" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="4.600" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="225.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="225.000" 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="0.200" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="3.800" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="290.000" 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="1.850" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="1.850" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="281.981" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="229.694" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="2.643" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="73.742" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="3.686" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="39.367" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="59.280" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="4.830" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="50">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
1.85 1.9 1.95 2.0 2.05 2.1 2.15 2.2 2.25 2.3 2.35 2.4 2.45 2.5 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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
225.000 225.000 225.000 225.000 225.000 230.000 230.000 230.000 230.000 231.500 233.000 234.500 236.000 237.500 239.000 240.500 242.000 243.500 245.000 245.000 245.000 245.000 245.000 250.000 250.000 250.000 255.000 255.000 255.000 260.000 265.000 265.000 270.000 270.000 275.000 275.000 280.000 285.000 290.000 290.000 299.375 308.750 318.125 327.500 336.875 346.250 355.625 365.000 385.000 410.423
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
0 0 0 0 66 57 60 0 66 48 0 0 0 0 0 0 0 0 57 66 72 75 78 69 72 75 75 75 75 78 72 75 69 78 72 72 72 69 66 66 0 0 0 0 0 0 0 60 57 60
</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 -0.390625 -0.390625 -2.734375 -0.390625 1.953125 -0.390625 1.171875 -0.390625 -0.390625 -0.390625 0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -2.734375 2.734375 1.171875 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -1.171875
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="133">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
93.502 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 136.833 140.0 145.0 150.0 155.0 160.0 163.667 165.0 170.0 175.0 180.0 185.0 190.0 190.5 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 281.981 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.234 0.307 0.343 0.354 0.35 0.337 0.314 0.279 0.226 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.208 0.236 0.265 0.294 0.322 0.351 0.354 0.438 0.548 0.7 0.962 1.564 2.263 2.721 3.059 3.327 3.546 3.729 3.881 4.006 4.107 4.186 4.244 4.281 4.298 4.3 4.298 4.283 4.257 4.221 4.174 4.12 4.057 3.988 3.914 3.835 3.752 3.666 3.577 3.486 3.394 3.302 3.208 3.115 3.022 2.93 2.839 2.749 2.66 2.573 2.487 2.403 2.321 2.241 2.163 2.087 2.014 1.942 1.872 1.804 1.739 1.675 1.614 1.554 1.496 1.441 1.387 1.335 1.285 1.236 1.19 1.145 1.101 1.059 1.019 0.98 0.943 0.907 0.872 0.839 0.806 0.775 0.746 0.717 0.689 0.663 0.637 0.612 0.589 0.566 0.544 0.523 0.503 0.483 0.465 0.447 0.429 0.413 0.397 0.381 0.366 0.352 0.339 0.325 0.313 0.301 0.289 0.278 0.267 0.257 0.247 0.237 0.228 0.219 0.21 0.202

</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="4.3" PeakHeight="281.981" Num="5" zHalfNm="229.694" Error="2.149">
-113.98 35.744 -15.352 1.343 0.764
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="80.5" Depth="0.154"/>
<TopsideChapman PeakHeight="281.981" PeakDensity="229404.47" PeakScaleHeight="39.367" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
