<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-26 -085 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 1 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 20% PACIFIC flags: Moderate F-spread, F2x cusp not found, 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" >
2026.03.26 (085) 00:30:00</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">
FF202608503260030009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="9.150" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.972" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="27.194" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="3.150" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="3.150" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="9.450" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="295.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="295.000" 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="0.450" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="8.750" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="395.000" 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="3.350" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="3.350" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="359.366" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="320.605" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.284" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="57.373" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="13.076" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="29.216" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="60.500" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.630" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="121">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
320.000 320.000 310.000 300.000 295.000 315.000 335.000 340.000 339.758 339.516 339.274 339.032 338.790 338.548 338.306 338.065 337.823 337.581 337.339 337.097 336.855 336.613 336.371 336.129 335.887 335.645 335.403 335.161 334.919 334.677 334.435 334.194 333.952 333.710 333.468 333.226 332.984 332.742 332.500 332.258 332.016 331.774 331.532 331.290 331.048 330.806 330.565 330.323 330.081 329.839 329.597 329.355 329.113 328.871 328.629 328.387 328.145 327.903 327.661 327.419 327.177 326.935 326.694 326.452 326.210 325.968 325.726 325.484 325.242 325.000 330.000 335.000 342.500 350.000 355.000 360.000 370.000 380.000 390.000 400.000 385.000 385.000 387.500 390.000 392.500 395.000 397.500 400.000 402.500 405.000 405.000 402.500 400.000 400.000 400.000 395.000 390.000 389.000 388.000 387.000 386.000 385.000 390.000 380.000 380.000 380.000 382.000 384.000 386.000 388.000 390.000 395.000 395.000 405.000 412.500 420.000 420.000 425.000 430.000 442.626 461.201
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
66 60 69 54 51 63 57 57 57 0 54 0 51 0 57 0 51 0 0 0 0 0 0 0 0 0 0 0 0 0 0 51 0 0 0 0 0 54 0 51 0 0 51 0 0 0 0 0 0 0 0 0 0 0 0 0 0 54 0 0 0 0 54 0 0 0 0 0 0 60 57 54 0 54 0 48 60 54 0 57 57 54 0 54 0 0 0 57 0 54 51 0 57 54 63 60 63 54 60 0 60 54 63 51 51 51 0 0 0 0 60 57 60 60 54 60 54 54 57 0 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 1.171875 0.390625 0.390625 1.171875 0.390625 0.390625 1.953125 0.390625 0.390625 1.171875 -0.390625 -1.171875 0.390625 1.171875 0.390625 0.390625 0.390625 0.390625 0.390625 1.953125 1.171875 0.390625 1.171875 1.171875 1.171875 0.390625 -2.734375 1.171875 1.171875 -0.390625 -0.390625 0.390625 -0.390625 -0.390625 1.171875 0.390625 0.390625 1.171875 1.171875 0.390625 -0.390625 1.171875 -1.171875 0.390625 1.953125 0.390625 1.171875 1.171875 2.734375 2.734375 0.390625 2.734375 1.171875 1.171875 1.171875 0.390625 -0.390625 1.171875 1.953125 -0.390625 1.171875 -0.390625 1.171875 1.171875 0.390625 -0.390625 1.171875 1.171875 -0.390625 -1.171875 -0.390625 -1.171875 -1.171875 -1.953125 -1.953125 1.171875 -0.390625 -0.390625 -0.390625 -0.390625 -1.171875 0.390625 -1.171875 -0.390625 -0.390625 -1.171875 -1.171875 -0.390625 -1.171875 -1.171875 -1.171875 -1.171875 1.953125 -1.171875 0.390625 -1.953125 0.390625 2.734375 1.953125 0.390625 1.953125 -1.953125 0.390625 -1.171875 -1.171875 -1.171875 -1.953125 -1.171875 -0.390625 -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="139">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
93.502 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 140.0 145.0 146.482 150.0 155.0 160.0 165.0 170.0 175.0 180.0 182.965 185.0 190.0 195.0 200.0 205.0 210.0 215.0 219.447 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 359.366 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0
</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 0.316 0.292 0.26 0.216 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.209 0.23 0.251 0.272 0.293 0.314 0.335 0.354 0.364 0.47 0.6 0.75 0.919 1.105 1.308 1.529 1.769 2.028 2.309 2.611 2.937 3.287 3.663 4.064 4.491 4.941 5.415 5.906 6.409 6.915 7.411 7.882 8.307 8.667 8.938 9.103 9.15 9.15 9.118 9.041 8.923 8.771 8.59 8.385 8.161 7.921 7.67 7.411 7.146 6.879 6.612 6.346 6.084 5.825 5.572 5.325 5.085 4.851 4.626 4.408 4.199 3.997 3.804 3.618 3.44 3.27 3.108 2.952 2.804 2.663 2.529 2.4 2.278 2.162 2.052 1.947 1.847 1.752 1.662 1.577 1.495 1.418 1.345 1.275 1.209 1.147 1.087 1.031 0.978 0.927 0.879 0.833 0.79 0.749 0.71 0.673 0.638 0.605 0.573 0.544 0.515 0.489 0.463 0.439 0.416 0.395 0.374 0.355 0.336 0.319 0.302 0.286 0.271 0.257 0.244 0.231 0.219 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="9.15" PeakHeight="359.366" Num="5" zHalfNm="320.605" Error="3.654">
-131.877 -14.392 7.401 -0.679 -0.372
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="109.447" Depth="0.154"/>
<TopsideChapman PeakHeight="359.366" PeakDensity="1038740.7" PeakScaleHeight="29.216" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
