<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-25 -084 21:50:00.000"
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 22 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 85% PACIFIC flags: 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" >
2026.03.25 (084) 21:50:00</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">
FF202608403252150009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="11.600" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.732" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="31.692" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.600" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="2.600" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="11.900" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="310.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="310.000" 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="11.550" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="485.000" 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="0.390" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="2.600" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="2.600" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="388.080" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="341.150" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="8.939" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="70.397" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="25.496" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="35.003" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="75.800" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.460" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="181">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
310.000 310.833 311.667 312.500 313.333 314.167 315.000 315.714 316.429 317.143 317.857 318.571 319.286 320.000 320.833 321.667 322.500 323.333 324.167 325.000 325.000 325.000 325.000 320.000 320.000 321.111 322.222 323.333 324.444 325.556 326.667 327.778 328.889 330.000 330.000 330.000 331.000 332.000 333.000 334.000 335.000 335.000 336.250 337.500 338.750 340.000 340.000 340.000 340.000 340.000 340.000 341.667 343.333 345.000 345.000 345.000 345.000 345.000 345.000 345.000 345.000 345.000 345.000 345.000 345.000 350.000 352.500 355.000 355.000 355.833 356.667 357.500 358.333 359.167 360.000 360.000 360.000 360.000 360.833 361.667 362.500 363.333 364.167 365.000 365.000 365.000 365.000 365.000 367.500 370.000 370.000 370.000 370.000 370.000 370.000 370.000 375.000 375.000 375.000 375.000 375.000 375.000 377.500 380.000 380.000 380.000 380.000 380.000 382.500 385.000 385.625 386.250 386.875 387.500 388.125 388.750 389.375 390.000 392.500 395.000 395.000 395.000 395.000 395.000 400.000 400.000 400.000 400.000 400.000 405.000 405.000 405.000 405.000 405.000 410.000 410.000 410.000 410.000 415.000 415.000 415.000 415.000 420.000 420.000 420.000 420.000 425.000 425.000 430.000 430.000 432.500 435.000 435.000 435.000 435.000 435.000 435.000 435.000 435.000 436.667 438.333 440.000 441.667 443.333 445.000 446.667 448.333 450.000 450.000 454.286 458.571 462.857 467.143 471.429 475.714 480.000 480.000 480.000 482.500 485.000 490.000
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
66 0 0 0 0 0 66 0 0 0 0 0 0 66 48 0 0 0 0 63 66 69 69 72 63 0 0 0 0 0 0 0 0 72 69 72 0 0 0 0 66 69 0 0 0 57 60 0 0 66 48 0 0 63 66 0 0 69 69 72 57 63 0 63 69 69 0 57 63 0 0 0 0 0 60 0 0 66 0 0 51 0 0 63 69 48 72 75 0 63 63 0 0 69 0 66 63 66 69 0 69 72 0 66 66 72 69 72 66 69 0 72 0 60 0 63 0 69 0 66 66 72 69 75 66 69 72 57 75 66 66 69 51 66 63 63 69 69 63 66 0 66 60 63 66 66 60 63 48 54 0 45 51 54 57 60 60 60 60 0 57 54 0 54 57 0 57 57 0 0 57 0 0 51 48 42 48 51 0 54 54
</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 -0.390625 -0.390625 -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 -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 1.953125 -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 -1.171875 -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 -1.171875 -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 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.953125 -1.171875 -1.953125 -1.953125 -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 2.734375 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -0.390625 -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 -1.953125
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="166">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
92.827 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 139.47 140.0 145.0 150.0 155.0 160.0 165.0 168.939 170.0 175.0 180.0 185.0 190.0 195.0 198.409 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 388.08 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.258 0.338 0.378 0.39 0.386 0.373 0.351 0.317 0.267 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.207 0.239 0.271 0.304 0.336 0.368 0.39 0.431 0.54 0.646 0.756 0.874 1.003 1.144 1.298 1.467 1.651 1.852 2.068 2.302 2.551 2.817 3.1 3.397 3.711 4.04 4.383 4.741 5.114 5.501 5.902 6.316 6.743 7.183 7.634 8.095 8.564 9.036 9.508 9.971 10.413 10.818 11.165 11.426 11.574 11.6 11.597 11.558 11.478 11.363 11.215 11.04 10.84 10.62 10.383 10.133 9.871 9.601 9.325 9.045 8.762 8.48 8.198 7.918 7.641 7.368 7.1 6.837 6.58 6.329 6.085 5.848 5.617 5.394 5.177 4.968 4.766 4.571 4.383 4.201 4.027 3.858 3.697 3.541 3.392 3.248 3.11 2.978 2.851 2.729 2.612 2.5 2.393 2.29 2.191 2.097 2.006 1.92 1.837 1.757 1.681 1.608 1.539 1.472 1.408 1.347 1.288 1.232 1.179 1.127 1.078 1.031 0.986 0.943 0.902 0.863 0.825 0.789 0.755 0.722 0.691 0.661 0.632 0.604 0.578 0.553 0.529 0.505 0.483 0.462 0.442 0.423 0.404 0.387 0.37 0.354 0.338 0.324 0.309 0.296 0.283 0.271 0.259 0.248 0.237 0.226 0.217 0.207

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="0.39" PeakHeight="110.0" Num="3" Error="0.0">
-19.938 2.967 -0.202
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="0.39" EndFrequency="11.6" PeakHeight="388.08" Num="5" zHalfNm="341.15" Error="3.412">
-172.379 -30.765 15.845 -4.217 1.845
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="88.409" Depth="0.19"/>
<TopsideChapman PeakHeight="388.08" PeakDensity="1669478.9" PeakScaleHeight="35.003" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
