<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-30 -089 14:50:00.000"
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 11 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 90% PACIFIC flags: 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" >
2026.03.30 (089) 14:50:00</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">
FF202608903301450009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="12.250" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.398" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="29.377" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="4.950" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="4.950" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="12.550" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="245.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="245.000" 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="11.250" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="525.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="3.400" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="4.950" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="4.950" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.365" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="387.892" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="268.898" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="8.118" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="155.522" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="68.614" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="84.486" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="193.400" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.330" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="147">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 9.9 9.95 10.0 10.05 10.1 10.15 10.2 10.25 10.3 10.35 10.4 10.45 10.5 10.55 10.6 10.65 10.7 10.75 10.8 10.85 10.9 10.95 11.0 11.05 11.1 11.15 11.2 11.25 11.3 11.35 11.4 11.45 11.5 11.55 11.6 11.65 11.7 11.75 11.8 11.85 11.9 11.95 12.0 12.05 12.1 12.15 12.2 12.25
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
245.000 250.000 260.000 270.000 270.000 274.000 278.000 282.000 286.000 290.000 290.000 290.000 290.000 290.000 295.000 295.000 295.000 295.000 300.000 300.000 301.667 303.333 305.000 305.000 307.500 310.000 312.000 314.000 316.000 318.000 320.000 315.000 320.000 325.000 325.000 325.000 325.000 325.000 330.000 330.000 335.000 335.000 335.000 340.000 342.500 345.000 345.000 345.000 345.000 350.000 351.875 353.750 355.625 357.500 359.375 361.250 363.125 365.000 370.000 370.000 370.000 375.000 375.000 375.000 380.000 380.000 385.000 385.000 390.000 390.000 390.000 395.000 395.000 395.000 400.000 400.000 405.000 405.000 410.000 415.000 415.000 415.000 420.000 420.000 425.000 430.000 430.000 430.000 435.000 440.000 440.000 440.000 445.000 450.000 450.000 452.500 455.000 455.000 455.000 460.000 460.000 462.500 465.000 467.500 470.000 470.000 475.000 477.500 480.000 481.667 483.333 485.000 485.000 490.000 490.000 495.000 495.000 497.500 500.000 505.000 510.000 510.000 515.000 520.000 520.000 525.000 525.000 535.000 540.000 542.500 545.000 550.000 555.000 560.000 565.000 570.000 575.000 580.000 585.000 591.261 598.115 605.650 613.973 623.215 633.535 645.136 658.271
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
45 48 51 45 51 0 0 0 0 48 51 54 0 51 51 0 48 51 51 54 0 0 57 57 0 51 0 0 0 0 45 48 0 0 0 51 48 48 60 57 60 57 54 54 0 54 0 0 60 60 0 0 0 51 0 63 0 63 54 0 66 57 60 66 57 66 54 60 45 54 63 57 66 66 66 66 66 66 66 60 66 66 66 60 63 57 66 66 63 54 60 63 60 48 54 45 51 0 57 57 57 51 57 0 54 54 51 0 48 0 0 51 54 54 51 51 51 0 48 0 51 51 0 48 48 48 45 45 42 0 48 48 48 0 45 45 45 48 48 45 48 48 45 45 42 0 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-0.390625 -0.390625 -0.390625 -2.734375 0.390625 0.390625 0.390625 1.171875 -0.390625 -0.390625 0.390625 -0.390625 0.390625 -0.390625 -0.390625 -1.953125 -0.390625 0.390625 -0.390625 -0.390625 0.390625 -1.953125 -0.390625 0.390625 2.734375 -0.390625 -0.390625 -0.390625 1.953125 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 -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 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 2.734375 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 0.390625 -0.390625 -0.390625 -0.390625 -0.390625 0.390625 -1.171875
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="188">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
89.482 90.0 95.0 100.0 105.0 110.0 111.51 113.02 114.53 115.0 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 387.892 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.241 2.287 2.942 3.289 3.4 3.277 3.277 3.4 3.414 3.556 3.696 3.836 3.976 4.119 4.264 4.412 4.564 4.72 4.88 5.045 5.213 5.386 5.562 5.742 5.924 6.109 6.295 6.482 6.671 6.859 7.048 7.236 7.423 7.609 7.794 7.978 8.161 8.342 8.522 8.701 8.879 9.056 9.231 9.406 9.58 9.752 9.924 10.096 10.266 10.436 10.605 10.773 10.94 11.106 11.27 11.431 11.587 11.738 11.88 12.008 12.117 12.198 12.243 12.25 12.249 12.242 12.226 12.203 12.173 12.135 12.091 12.041 11.984 11.922 11.855 11.782 11.705 11.623 11.536 11.446 11.353 11.255 11.155 11.052 10.945 10.837 10.726 10.613 10.499 10.382 10.265 10.146 10.026 9.905 9.783 9.66 9.537 9.414 9.29 9.166 9.043 8.919 8.795 8.672 8.549 8.427 8.305 8.184 8.063 7.943 7.824 7.706 7.588 7.472 7.356 7.242 7.129 7.016 6.905 6.795 6.686 6.578 6.472 6.367 6.262 6.16 6.058 5.958 5.859 5.761 5.665 5.57 5.476 5.383 5.292 5.202 5.113 5.026 4.94 4.855 4.771 4.689 4.608 4.528 4.449 4.371 4.295 4.22 4.146 4.073 4.002 3.932 3.862 3.794 3.727 3.661 3.596 3.532 3.47 3.408 3.347 3.288 3.229 3.171 3.115 3.059 3.004 2.95 2.897 2.845 2.794 2.744 2.695 2.646 2.599 2.552 2.506 2.46 2.416 2.372 2.33 2.287 2.246 2.205 2.165 2.126 2.088

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.4" PeakHeight="110.0" Num="3" Error="0.0">
-30.507 13.161 -3.172
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.4" EndFrequency="12.25" PeakHeight="387.892" Num="5" zHalfNm="268.898" Error="4.804">
-231.174 -59.377 24.342 -10.008 2.855
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="4.53" Depth="0.123"/>
<TopsideChapman PeakHeight="387.892" PeakDensity="1861817.6" PeakScaleHeight="84.486" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
