<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-30 -089 01:10:00.000"
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 33 1 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 60% PACIFIC flags: Moderate F-spread, Multiple candidates for F2x cusp, Multiple candidates for F2o cusp, One of F2 cusps was derived from the other, 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" >
2026.03.30 (089) 01:10:00</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">
FF202608903300110009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="8.350" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.612" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="21.814" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.650" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="2.650" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="8.650" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="370.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="370.000" 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="0.750" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="7.950" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="487.000" 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="2.650" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="2.650" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="423.617" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="367.290" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="6.949" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="82.916" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="15.870" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="42.766" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="86.980" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.640" 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" >
2.65 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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
370.000 372.500 375.000 375.000 385.000 385.000 385.714 386.429 387.143 387.857 388.571 389.286 390.000 390.714 391.429 392.143 392.857 393.571 394.286 395.000 395.000 390.000 385.000 384.118 383.235 382.353 381.471 380.588 379.706 378.824 377.941 377.059 376.176 375.294 374.412 373.529 372.647 371.765 370.882 370.000 375.000 380.000 381.667 383.333 385.000 390.000 392.500 395.000 390.000 385.000 385.000 385.000 386.667 388.333 390.000 391.667 393.333 395.000 397.500 400.000 401.364 402.727 404.091 405.455 406.818 408.182 409.545 410.909 412.273 413.636 415.000 420.000 425.000 427.500 430.000 432.500 435.000 437.500 440.000 440.000 442.500 445.000 447.500 450.000 452.500 455.000 457.500 460.000 462.500 465.000 455.000 455.000 455.000 456.667 458.333 435.000 441.667 448.333 455.000 459.000 463.000 467.000 471.000 475.000 479.000 483.000 487.000 491.000 497.328 504.609 513.076 523.044 534.951 549.425 567.394
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
54 0 60 57 60 57 0 0 0 57 57 60 0 0 0 0 63 0 0 60 57 57 60 57 0 57 0 0 57 51 63 0 60 63 0 63 0 60 0 0 0 60 54 0 57 63 0 0 63 57 63 57 0 0 60 0 0 57 0 57 0 63 60 0 63 63 63 0 63 63 60 54 63 0 0 0 60 0 57 60 63 0 57 0 0 57 57 60 0 57 0 57 63 0 0 51 0 0 60 57 63 54 57 60 60 60 54 54 54 57 0 0 0 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 -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 -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 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 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 -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 1.953125 -1.953125 0.390625 0.390625 -0.390625 1.953125 0.390625 0.390625 0.390625 1.171875 0.390625 0.390625 -0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 1.171875 1.171875 1.171875 -0.390625 0.390625
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="187">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
93.502 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 140.0 145.0 147.068 150.0 155.0 160.0 165.0 170.0 175.0 180.0 184.137 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 221.205 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 423.617 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</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 0.317 0.294 0.263 0.222 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.204 0.224 0.245 0.266 0.287 0.307 0.328 0.349 0.354 0.401 0.474 0.557 0.648 0.747 0.851 0.961 1.077 1.198 1.327 1.462 1.605 1.755 1.915 2.084 2.263 2.453 2.654 2.868 3.095 3.336 3.591 3.861 4.145 4.444 4.755 5.078 5.411 5.749 6.088 6.424 6.75 7.061 7.349 7.61 7.838 8.027 8.176 8.28 8.338 8.35 8.349 8.332 8.295 8.24 8.168 8.08 7.979 7.866 7.743 7.61 7.47 7.322 7.17 7.012 6.852 6.688 6.523 6.357 6.19 6.024 5.858 5.693 5.53 5.369 5.209 5.053 4.898 4.747 4.599 4.454 4.312 4.173 4.038 3.906 3.778 3.653 3.531 3.413 3.298 3.186 3.078 2.973 2.872 2.773 2.678 2.585 2.496 2.409 2.325 2.244 2.166 2.09 2.016 1.946 1.877 1.811 1.747 1.685 1.626 1.568 1.513 1.459 1.407 1.357 1.309 1.262 1.218 1.174 1.132 1.092 1.053 1.015 0.979 0.944 0.911 0.878 0.847 0.816 0.787 0.759 0.732 0.706 0.68 0.656 0.633 0.61 0.588 0.567 0.547 0.527 0.508 0.49 0.472 0.456 0.439 0.423 0.408 0.394 0.38 0.366 0.353 0.34 0.328 0.316 0.305 0.294 0.283 0.273 0.263 0.254 0.245 0.236 0.228 0.219 0.212 0.204

</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="8.35" PeakHeight="423.617" Num="5" zHalfNm="367.29" Error="4.61">
-189.58 -20.087 6.58 2.208 -1.533
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="111.205" Depth="0.154"/>
<TopsideChapman PeakHeight="423.617" PeakDensity="865043.44" PeakScaleHeight="42.766" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
