<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-15 -074 03:30:00.000"
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 11 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 95% PACIFIC flags: Multiple candidates for F2x cusp</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" >
2026.03.15 (074) 03:30:00</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">
FF202607403150330009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="7.850" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="3.455" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="27.125" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.500" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="2.500" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="8.250" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="200.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="200.000" 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="0.100" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="7.150" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="280.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="0.354" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="2.600" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="2.600" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="264.130" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="216.663" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="5.469" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="67.034" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="11.190" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="35.936" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="54.220" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="4.600" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="108">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
220.000 225.000 200.000 200.000 210.000 220.000 220.000 220.000 216.667 213.333 210.000 205.000 205.000 205.000 210.000 210.000 210.000 210.000 210.000 210.000 210.000 210.000 210.455 210.909 211.364 211.818 212.273 212.727 213.182 213.636 214.091 214.545 215.000 215.000 215.000 220.000 220.000 220.000 220.000 220.000 220.000 220.000 220.000 221.667 223.333 225.000 225.000 225.000 227.500 230.000 230.000 230.000 230.000 230.000 230.000 232.500 235.000 235.000 235.000 235.000 235.000 235.000 235.000 235.000 240.000 240.000 240.000 245.000 245.000 246.250 247.500 248.750 250.000 250.000 250.000 250.000 250.000 250.000 255.000 257.500 260.000 260.000 260.000 265.000 265.000 270.000 270.000 270.000 270.000 275.000 275.000 280.000 280.000 280.000 285.000 290.000 295.000 300.000 300.000 305.000 309.103 314.093 320.294 328.206 338.653 353.083 374.312 408.624
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
54 51 63 63 0 54 0 51 0 0 63 69 72 75 75 0 69 75 75 0 78 78 0 0 0 0 69 0 51 54 0 0 72 0 0 72 0 75 0 0 57 0 75 0 48 66 72 0 54 0 57 63 63 0 72 0 60 63 69 72 72 0 60 69 69 72 75 63 63 0 0 0 60 69 69 57 72 0 63 0 69 66 66 63 69 60 66 72 72 72 72 69 69 72 0 72 66 69 66 0 69 69 69 66 66 66 63 54
</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 -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 -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 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 -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 -1.171875 -1.171875
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="135">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
93.502 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 131.0 135.0 140.0 145.0 150.0 152.0 155.0 160.0 165.0 170.0 173.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 264.13 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.234 0.307 0.343 0.354 0.348 0.331 0.299 0.247 0.233 0.233 0.233 0.233 0.233 0.233 0.25 0.279 0.308 0.337 0.354 0.395 0.524 0.71 0.994 1.475 2.362 3.573 4.58 5.339 5.929 6.401 6.783 7.093 7.341 7.535 7.68 7.78 7.836 7.85 7.85 7.83 7.784 7.715 7.623 7.514 7.387 7.247 7.096 6.934 6.765 6.589 6.409 6.226 6.04 5.854 5.668 5.482 5.298 5.116 4.937 4.761 4.589 4.421 4.256 4.096 3.94 3.788 3.641 3.499 3.361 3.228 3.099 2.975 2.855 2.739 2.628 2.521 2.417 2.318 2.222 2.13 2.042 1.957 1.876 1.798 1.723 1.651 1.581 1.515 1.451 1.39 1.332 1.276 1.222 1.17 1.121 1.074 1.028 0.985 0.943 0.903 0.865 0.828 0.793 0.76 0.727 0.697 0.667 0.639 0.612 0.586 0.561 0.537 0.514 0.492 0.471 0.451 0.432 0.414 0.396 0.379 0.363 0.348 0.333 0.319 0.305 0.292 0.28 0.268 0.257 0.246 0.235 0.225 0.216 0.206

</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="7.85" PeakHeight="264.13" Num="5" zHalfNm="216.663" Error="1.268">
-112.831 35.66 -17.418 3.875 -0.416
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="63.0" Depth="0.121"/>
<TopsideChapman PeakHeight="264.13" PeakDensity="764547.1" PeakScaleHeight="35.936" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
