<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-15 -074 00:30:00.000"
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 55 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 20% PACIFIC flags: F2x cusp not found, Multiple candidates for F2x cusp, Multiple candidates for F2o cusp, F2 cusps do not match, Unidentified traces above foF2</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) 00:30:00</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">
FF202607403150030009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="23" >
<URSI ID="00" Val="9.200" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="3.084" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="28.369" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="1.750" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="1.750" Name="fminF" 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="8.500" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="350.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="0.354" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="1.800" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="1.800" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="328.237" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="277.852" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.284" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="73.390" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="16.700" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="37.732" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="70.920" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="2.230" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="150">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
1.75 1.8 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 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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
230.000 225.000 230.000 225.000 232.500 240.000 245.000 247.500 250.000 245.000 245.000 245.000 247.500 250.000 250.000 250.000 250.000 250.000 250.000 255.000 250.000 250.833 251.667 252.500 253.333 254.167 255.000 260.000 260.000 266.667 273.333 280.000 280.000 277.500 275.000 275.000 275.000 275.000 275.000 275.000 275.000 275.000 275.000 275.000 275.000 275.000 275.000 275.000 275.000 275.000 275.000 275.000 275.000 280.000 280.000 280.000 280.000 280.000 280.000 282.500 285.000 285.000 285.000 280.000 290.000 290.000 295.000 285.000 295.000 295.000 295.000 296.250 297.500 298.750 300.000 300.000 300.000 305.000 305.000 320.000 315.000 310.000 310.000 310.676 311.351 312.027 312.703 313.378 314.054 314.730 315.405 316.081 316.757 317.432 318.108 318.784 319.459 320.135 320.811 321.486 322.162 322.838 323.514 324.189 324.865 325.541 326.216 326.892 327.568 328.243 328.919 329.595 330.270 330.946 331.622 332.297 332.973 333.649 334.324 335.000 330.000 335.000 335.000 340.000 345.000 345.000 345.000 345.000 350.000 350.000 350.000 350.000 350.000 350.000 350.000 350.000 356.667 363.333 370.000 371.667 375.538 379.950 385.023 390.918 397.853 406.129 416.177 428.635 444.488 465.342
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
60 66 54 54 0 54 54 0 60 69 0 63 0 66 63 75 75 0 69 72 75 0 0 78 0 0 0 72 0 0 0 63 57 0 63 60 60 0 66 60 66 57 66 57 63 0 54 63 0 72 72 69 75 66 66 63 66 66 69 63 63 60 63 60 63 63 60 63 60 60 60 0 0 0 57 51 60 57 0 48 0 51 57 0 0 0 0 0 0 0 0 0 0 0 0 0 48 0 51 0 51 0 0 48 0 0 0 0 57 0 0 57 0 0 0 60 0 51 57 63 69 66 69 66 63 69 75 75 69 72 81 81 75 78 69 75 72 69 60 57 51 51 51 45 0 48 0 48 0 48
</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 -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 -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 -0.390625 -0.390625 -0.390625 -1.171875 -0.390625 -1.171875 -1.171875 -0.390625 -1.171875 2.734375 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 1.171875 -1.171875 -1.171875 2.734375 0.390625 0.390625 -2.734375 -1.171875 -1.953125 -0.390625 -1.953125 -1.171875 1.953125 -1.171875 -2.734375 2.734375 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.953125 2.734375 -0.390625 -2.734375 -1.953125 2.734375 -1.171875 -1.171875 -1.171875 -2.734375 -1.171875 -1.171875 0.390625 0.390625 0.390625 0.390625 -1.171875 0.390625 0.390625 0.390625 0.390625 0.390625 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 -1.171875 -1.171875 -1.171875 -1.171875 -1.953125 -1.171875 -2.734375 -0.390625
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="157">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
93.502 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 136.833 140.0 145.0 150.0 155.0 160.0 163.667 165.0 170.0 175.0 180.0 185.0 190.0 190.5 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 328.237 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0
</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 0.435 0.553 0.708 0.91 1.162 1.464 1.809 2.189 2.596 3.025 3.469 3.925 4.389 4.857 5.326 5.792 6.25 6.695 7.122 7.526 7.9 8.239 8.535 8.783 8.978 9.113 9.187 9.2 9.198 9.172 9.118 9.039 8.938 8.816 8.677 8.523 8.356 8.178 7.991 7.798 7.598 7.395 7.189 6.981 6.773 6.565 6.359 6.154 5.952 5.753 5.557 5.365 5.177 4.993 4.814 4.64 4.47 4.305 4.145 3.989 3.839 3.693 3.552 3.416 3.284 3.157 3.035 2.917 2.802 2.693 2.587 2.485 2.387 2.292 2.201 2.114 2.029 1.949 1.871 1.796 1.724 1.655 1.589 1.525 1.464 1.405 1.348 1.294 1.242 1.192 1.144 1.098 1.053 1.011 0.97 0.931 0.893 0.857 0.822 0.789 0.757 0.727 0.697 0.669 0.642 0.616 0.591 0.567 0.544 0.522 0.501 0.48 0.461 0.442 0.424 0.407 0.391 0.375 0.36 0.345 0.331 0.318 0.305 0.292 0.281 0.269 0.258 0.248 0.238 0.228 0.219 0.21 0.201

</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="9.2" PeakHeight="328.237" Num="5" zHalfNm="277.852" Error="2.498">
-145.948 9.478 0.498 -2.121 0.356
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="80.5" Depth="0.154"/>
<TopsideChapman PeakHeight="328.237" PeakDensity="1050124.1" PeakScaleHeight="37.732" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
