<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-28 -087 21:30:00.000"
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 33 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 65% PACIFIC flags: Multiple candidates for F2x cusp, F2 cusps do not match</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) 21:30:00</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">
FF202608703282130009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="9.850" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.540" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="25.018" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.900" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="2.900" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="8.950" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="315.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="315.000" 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="0.350" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="9.350" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="505.000" 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="0.598" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="2.900" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="2.900" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="410.493" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="338.595" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="9.173" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="105.114" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="27.559" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="53.432" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="107.910" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.800" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="140">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 9.25 9.3 9.35 9.4 9.45 9.5 9.55 9.6 9.65 9.7 9.75 9.8 9.85
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
315.000 315.000 320.000 320.000 325.000 322.500 320.000 320.000 320.000 320.000 322.500 325.000 327.500 330.000 325.000 325.000 326.667 328.333 330.000 331.667 333.333 335.000 335.000 336.000 337.000 338.000 339.000 340.000 340.000 340.000 340.000 340.000 340.000 340.000 341.818 343.636 345.455 347.273 349.091 350.909 352.727 354.545 356.364 358.182 360.000 360.000 360.000 360.833 361.667 362.500 363.333 364.167 365.000 365.000 365.000 365.000 366.667 368.333 370.000 370.000 372.500 375.000 380.000 380.000 382.500 385.000 380.000 385.000 385.000 385.000 385.000 385.000 385.000 390.000 395.000 395.000 395.000 395.000 395.000 400.000 400.000 400.000 405.000 405.000 405.000 410.000 410.000 410.000 411.667 413.333 415.000 420.000 420.000 420.000 425.000 425.000 430.000 430.000 435.000 435.000 435.000 435.000 440.000 440.000 445.000 445.000 445.000 445.000 447.500 450.000 452.500 455.000 457.500 460.000 460.000 470.000 470.000 475.000 475.000 480.000 480.000 485.000 485.000 490.000 495.000 495.000 500.000 500.000 505.000 505.000 510.000 515.000 520.000 526.413 533.727 542.144 551.936 563.469 577.253 594.017
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
57 60 72 66 0 51 0 0 75 60 0 0 0 75 0 69 0 0 0 75 54 72 72 0 0 0 0 75 60 0 0 0 57 54 0 0 57 0 0 0 0 57 0 0 48 54 0 0 0 0 0 0 63 66 0 69 0 0 69 69 0 69 57 60 0 54 69 57 63 0 0 0 0 66 54 0 0 66 66 63 63 66 57 60 63 57 63 63 0 0 72 66 72 75 69 72 60 69 57 63 66 66 63 63 57 66 57 63 54 63 51 66 0 63 0 57 63 60 63 60 66 63 63 60 57 66 63 63 63 60 63 63 57 45 0 0 0 0 0 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-1.171875 -1.171875 -1.171875 -1.171875 -0.390625 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.953125 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -0.390625 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -0.390625 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -0.390625 -1.171875 -1.171875 -1.171875 -1.171875 -1.953125 -0.390625 -0.390625 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.953125 -1.953125 1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -2.734375 -1.953125 -2.734375 -2.734375 -2.734375 1.953125 -1.953125 2.734375 1.953125 -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" >
91.112 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 136.563 140.0 145.0 150.0 155.0 160.0 163.126 165.0 170.0 175.0 180.0 185.0 189.689 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 410.493 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.396 0.518 0.579 0.598 0.59 0.564 0.518 0.447 0.331 0.277 0.277 0.277 0.277 0.277 0.277 0.277 0.3 0.36 0.42 0.481 0.541 0.598 0.606 0.713 0.812 0.912 1.016 1.127 1.246 1.375 1.516 1.669 1.835 2.014 2.208 2.415 2.635 2.867 3.109 3.361 3.621 3.889 4.162 4.44 4.722 5.007 5.296 5.586 5.878 6.17 6.463 6.756 7.047 7.335 7.62 7.899 8.172 8.436 8.688 8.926 9.145 9.343 9.513 9.653 9.758 9.825 9.85 9.85 9.843 9.821 9.783 9.732 9.667 9.591 9.504 9.407 9.301 9.186 9.065 8.937 8.803 8.664 8.521 8.375 8.225 8.073 7.919 7.763 7.606 7.449 7.292 7.135 6.978 6.822 6.667 6.513 6.36 6.209 6.06 5.913 5.768 5.625 5.484 5.346 5.21 5.077 4.946 4.817 4.691 4.568 4.447 4.329 4.213 4.1 3.99 3.882 3.777 3.674 3.573 3.475 3.38 3.287 3.196 3.107 3.021 2.937 2.855 2.775 2.698 2.622 2.548 2.477 2.407 2.339 2.273 2.209 2.146 2.085 2.026 1.969 1.913 1.858 1.806 1.754 1.704 1.656 1.608 1.562 1.518 1.474 1.432 1.391 1.352 1.313 1.275 1.239 1.203 1.169 1.135 1.103 1.071 1.04 1.01 0.981 0.953 0.926 0.899 0.873 0.848 0.824 0.8 0.777 0.755 0.733 0.712 0.692 0.672 0.652 0.634 0.615 0.598 0.58 0.564 0.548 0.532 0.516

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="0.598" PeakHeight="110.0" Num="3" Error="0.0">
-23.648 5.34 -0.58
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="0.598" EndFrequency="9.85" PeakHeight="410.493" Num="5" zHalfNm="338.595" Error="3.229">
-212.607 -15.598 9.35 -4.398 2.449
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="79.689" Depth="0.321"/>
<TopsideChapman PeakHeight="410.493" PeakDensity="1203753.1" PeakScaleHeight="53.432" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
