<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-28 -087 02:10:00.000"
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 22 1 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 80% PACIFIC flags: Moderate F-spread, Multiple candidates for F2x cusp, 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" >
2026.03.28 (087) 02:10:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.18" 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">
FF202608703280210009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="8.250" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.828" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="23.333" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.550" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="2.550" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="8.550" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="290.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="290.000" 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="0.300" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="7.900" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="431.411" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="0.354" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="2.750" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="2.750" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="375.317" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="326.808" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="6.313" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="71.519" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="12.997" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="35.874" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="72.600" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.850" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="115">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
305.000 302.500 300.000 300.000 290.000 292.500 295.000 297.500 300.000 300.000 300.000 300.000 300.000 300.000 300.000 302.500 305.000 307.500 310.000 312.500 315.000 317.500 320.000 322.500 325.000 325.000 327.500 330.000 331.667 333.333 335.000 335.000 335.000 335.000 335.000 340.000 340.000 350.000 351.364 352.727 354.091 355.455 356.818 358.182 359.545 360.909 362.273 363.636 365.000 361.667 358.333 355.000 355.000 355.000 355.000 355.000 356.000 357.000 358.000 359.000 360.000 355.000 360.000 365.000 365.000 365.000 370.000 375.000 380.000 382.500 385.000 387.500 390.000 390.000 390.000 400.000 402.500 405.000 400.000 400.000 400.000 400.000 405.000 410.000 415.000 411.250 407.500 403.750 400.000 405.000 405.000 405.000 400.000 405.000 410.000 415.000 420.000 420.000 420.000 420.661 421.405 422.251 423.221 424.343 425.657 427.216 429.097 431.411 434.325 438.109 443.221 450.507 461.731 481.266 523.773
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
60 0 63 60 66 0 57 0 63 0 63 0 0 66 63 63 0 69 57 69 63 66 63 63 63 60 0 51 0 60 60 57 60 0 66 72 72 63 60 63 63 57 60 0 54 0 0 0 60 0 0 60 60 63 66 60 0 0 0 57 60 0 0 57 63 60 0 66 66 60 57 63 66 0 63 54 0 60 66 0 0 60 57 60 57 54 57 60 63 60 0 57 60 63 60 0 57 60 0 63 63 57 60 63 51 60 60 0 54 54 54 51 51 51 45
</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 1.171875 0.390625 0.390625 1.171875 0.390625 1.171875 0.390625 0.390625 0.390625 0.390625 0.390625 -0.390625 0.390625 0.390625 0.390625 0.390625 1.171875 0.390625 -1.171875 -0.390625 -0.390625 1.171875 1.171875 0.390625 -0.390625 -0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 1.171875 2.734375 0.390625 -0.390625 0.390625 0.390625 0.390625 -1.171875 -0.390625 -0.390625 -0.390625 -0.390625 -1.171875 1.953125 -0.390625 -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 1.171875 0.390625 1.171875 2.734375 -0.390625 0.390625 1.953125 0.390625 0.390625 1.171875 1.171875 0.390625 0.390625 1.171875 1.171875 1.171875 0.390625 1.953125 1.171875 1.171875 0.390625 1.953125 0.390625 0.390625 1.171875 -1.953125 0.390625 0.390625 0.390625 1.171875 0.390625 1.171875 0.390625 0.390625 -0.390625 1.171875 1.953125 0.390625 1.171875 1.171875 1.171875 1.171875
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="158">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
93.502 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 140.0 145.0 147.554 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 185.107 190.0 195.0 200.0 205.0 210.0 215.0 220.0 222.661 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 375.317 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0
</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 0.334 0.318 0.296 0.266 0.226 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.22 0.241 0.261 0.282 0.302 0.323 0.343 0.354 0.409 0.509 0.612 0.727 0.862 1.021 1.21 1.433 1.688 1.972 2.279 2.601 2.933 3.271 3.614 3.96 4.308 4.657 5.007 5.358 5.708 6.055 6.399 6.735 7.06 7.367 7.647 7.889 8.079 8.203 8.25 8.25 8.237 8.195 8.127 8.036 7.924 7.795 7.651 7.494 7.326 7.149 6.966 6.777 6.585 6.39 6.194 5.997 5.802 5.608 5.416 5.227 5.041 4.859 4.68 4.506 4.337 4.172 4.011 3.856 3.705 3.559 3.418 3.281 3.15 3.023 2.9 2.782 2.668 2.559 2.453 2.352 2.255 2.161 2.071 1.985 1.902 1.823 1.746 1.673 1.603 1.535 1.471 1.409 1.349 1.292 1.238 1.185 1.135 1.087 1.041 0.997 0.955 0.914 0.875 0.838 0.803 0.769 0.736 0.705 0.675 0.646 0.618 0.592 0.567 0.543 0.52 0.498 0.476 0.456 0.437 0.418 0.4 0.383 0.367 0.351 0.336 0.322 0.308 0.295 0.283 0.271 0.259 0.248 0.237 0.227 0.218 0.208

</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="8.25" PeakHeight="375.317" Num="5" zHalfNm="326.808" Error="3.574">
-149.755 -8.421 8.368 -5.5 2.652
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="112.661" Depth="0.154"/>
<TopsideChapman PeakHeight="375.317" PeakDensity="844447.9" PeakScaleHeight="35.874" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
